text: /**
   * Copyright (c) Facebook, Inc. and its affiliates.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @flow
   */
  
  import type {
    Instance,
    TextInstance,
    Container,
    ChildSet,
    UpdatePayload,
  } from './ReactFiberHostConfig';
  import type {Fiber} from './ReactFiber';
  import type {FiberRoot} from './ReactFiberRoot';
  import type {ExpirationTime} from './ReactFiberExpirationTime';
  import type {CapturedValue, CapturedError} from './ReactCapturedValue';
  
  import {
    enableSchedulerTracking,
    enableProfilerTimer,
    enableSuspense,
  } from 'shared/ReactFeatureFlags';
  import {
    ClassComponent,
    ClassComponentLazy,
    HostRoot,
    HostComponent,
    HostText,
    HostPortal,
    Profiler,
    PlaceholderComponent,
  } from 'shared/ReactWorkTags';
  import {
    invokeGuardedCallback,
    hasCaughtError,
    clearCaughtError,
  } from 'shared/ReactErrorUtils';
  import {
    NoEffect,
    ContentReset,
    Placement,
    Snapshot,
    Update,
  } from 'shared/ReactSideEffectTags';
  import getComponentName from 'shared/getComponentName';
  import invariant from 'shared/invariant';
  import warningWithoutStack from 'shared/warningWithoutStack';
  
  import {Sync} from './ReactFiberExpirationTime';
  import {onCommitUnmount} from './ReactFiberDevToolsHook';
  import {startPhaseTimer, stopPhaseTimer} from './ReactDebugFiberPerf';
  import {getStackByFiberInDevAndProd} from './ReactCurrentFiber';
  import {logCapturedError} from './ReactFiberErrorLogger';
  import {getCommitTime} from './ReactProfilerTimer';
  import {commitUpdateQueue} from './ReactUpdateQueue';
  import {
    getPublicInstance,
    supportsMutation,
    supportsPersistence,
    commitMount,
    commitUpdate,
    resetTextContent,
    commitTextUpdate,
    appendChild,
    appendChildToContainer,
    insertBefore,
    insertInContainerBefore,
    removeChild,
    removeChildFromContainer,
    replaceContainerChildren,
    createContainerChildSet,
  } from './ReactFiberHostConfig';
  import {
    captureCommitPhaseError,
    requestCurrentTime,
    scheduleWork,
  } from './ReactFiberScheduler';
  import {StrictMode} from './ReactTypeOfMode';
  
  const emptyObject = {};
  
  let didWarnAboutUndefinedSnapshotBeforeUpdate: Set<mixed> | null = null;
  if (__DEV__) {
    didWarnAboutUndefinedSnapshotBeforeUpdate = new Set();
  }
  
  export function logError(boundary: Fiber, errorInfo: CapturedValue<mixed>) {
    const source = errorInfo.source;
    let stack = errorInfo.stack;
    if (stack === null && source !== null) {
      stack = getStackByFiberInDevAndProd(source);
    }
  
    const capturedError: CapturedError = {
      componentName: source !== null ? getComponentName(source.type) : null,
      componentStack: stack !== null ? stack : '',
      error: errorInfo.value,
      errorBoundary: null,
      errorBoundaryName: null,
      errorBoundaryFound: false,
      willRetry: false,
    };
  
    if (boundary !== null && boundary.tag === ClassComponent) {
      capturedError.errorBoundary = boundary.stateNode;
      capturedError.errorBoundaryName = getComponentName(boundary.type);
      capturedError.errorBoundaryFound = true;
      capturedError.willRetry = true;
    }
  
    try {
      logCapturedError(capturedError);
    } catch (e) {
      // This method must not throw, or React internal state will get messed up.
      // If console.error is overridden, or logCapturedError() shows a dialog that throws,
      // we want to report this error outside of the normal stack as a last resort.
      // https://github.com/facebook/react/issues/13188
      setTimeout(() => {
        throw e;
      });
    }
  }
  
  const callComponentWillUnmountWithTimer = function(current, instance) {
    startPhaseTimer(current, 'componentWillUnmount');
    instance.props = current.memoizedProps;
    instance.state = current.memoizedState;
    instance.componentWillUnmount();
    stopPhaseTimer();
  };
  
  // Capture errors so they don't interrupt unmounting.
  function safelyCallComponentWillUnmount(current, instance) {
    if (__DEV__) {
      invokeGuardedCallback(
        null,
        callComponentWillUnmountWithTimer,
        null,
        current,
        instance,
      );
      if (hasCaughtError()) {
        const unmountError = clearCaughtError();
        captureCommitPhaseError(current, unmountError);
      }
    } else {
      try {
        callComponentWillUnmountWithTimer(current, instance);
      } catch (unmountError) {
        captureCommitPhaseError(current, unmountError);
      }
    }
  }
  
  function safelyDetachRef(current: Fiber) {
    const ref = current.ref;
    if (ref !== null) {
      if (typeof ref === 'function') {
        if (__DEV__) {
          invokeGuardedCallback(null, ref, null, null);
          if (hasCaughtError()) {
            const refError = clearCaughtError();
            captureCommitPhaseError(current, refError);
          }
        } else {
          try {
            ref(null);
          } catch (refError) {
            captureCommitPhaseError(current, refError);
          }
        }
      } else {
        ref.current = null;
      }
    }
  }
  
  function commitBeforeMutationLifeCycles(
    current: Fiber | null,
    finishedWork: Fiber,
  ): void {
    switch (finishedWork.tag) {
      case ClassComponent:
      case ClassComponentLazy: {
        if (finishedWork.effectTag & Snapshot) {
          if (current !== null) {
            const prevProps = current.memoizedProps;
            const prevState = current.memoizedState;
            startPhaseTimer(finishedWork, 'getSnapshotBeforeUpdate');
            const instance = finishedWork.stateNode;
            instance.props = finishedWork.memoizedProps;
            instance.state = finishedWork.memoizedState;
            const snapshot = instance.getSnapshotBeforeUpdate(
              prevProps,
              prevState,
            );
            if (__DEV__) {
              const didWarnSet = ((didWarnAboutUndefinedSnapshotBeforeUpdate: any): Set<
                mixed,
              >);
              if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) {
                didWarnSet.add(finishedWork.type);
                warningWithoutStack(
                  false,
                  '%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' +
                    'must be returned. You have returned undefined.',
                  getComponentName(finishedWork.type),
                );
              }
            }
            instance.__reactInternalSnapshotBeforeUpdate = snapshot;
            stopPhaseTimer();
          }
        }
        return;
      }
      case HostRoot:
      case HostComponent:
      case HostText:
      case HostPortal:
        // Nothing to do for these component types
        return;
      default: {
        invariant(
          false,
          'This unit of work tag should not have side-effects. This error is ' +
            'likely caused by a bug in React. Please file an issue.',
        );
      }
    }
  }
  
  function commitLifeCycles(
    finishedRoot: FiberRoot,
    current: Fiber | null,
    finishedWork: Fiber,
    committedExpirationTime: ExpirationTime,
  ): void {
    switch (finishedWork.tag) {
      case ClassComponent:
      case ClassComponentLazy: {
        const instance = finishedWork.stateNode;
        if (finishedWork.effectTag & Update) {
          if (current === null) {
            startPhaseTimer(finishedWork, 'componentDidMount');
            instance.props = finishedWork.memoizedProps;
            instance.state = finishedWork.memoizedState;
            instance.componentDidMount();
            stopPhaseTimer();
          } else {
            const prevProps = current.memoizedProps;
            const prevState = current.memoizedState;
            startPhaseTimer(finishedWork, 'componentDidUpdate');
            instance.props = finishedWork.memoizedProps;
            instance.state = finishedWork.memoizedState;
            instance.componentDidUpdate(
              prevProps,
              prevState,
              instance.__reactInternalSnapshotBeforeUpdate,
            );
            stopPhaseTimer();
          }
        }
        const updateQueue = finishedWork.updateQueue;
        if (updateQueue !== null) {
          instance.props = finishedWork.memoizedProps;
          instance.state = finishedWork.memoizedState;
          commitUpdateQueue(
            finishedWork,
            updateQueue,
            instance,
            committedExpirationTime,
          );
        }
        return;
      }
      case HostRoot: {
        const updateQueue = finishedWork.updateQueue;
        if (updateQueue !== null) {
          let instance = null;
          if (finishedWork.child !== null) {
            switch (finishedWork.child.tag) {
              case HostComponent:
                instance = getPublicInstance(finishedWork.child.stateNode);
                break;
              case ClassComponent:
              case ClassComponentLazy:
                instance = finishedWork.child.stateNode;
                break;
            }
          }
          commitUpdateQueue(
            finishedWork,
            updateQueue,
            instance,
            committedExpirationTime,
          );
        }
        return;
      }
      case HostComponent: {
        const instance: Instance = finishedWork.stateNode;
  
        // Renderers may schedule work to be done after host components are mounted
        // (eg DOM renderer may schedule auto-focus for inputs and form controls).
        // These effects should only be committed when components are first mounted,
        // aka when there is no current/alternate.
        if (current === null && finishedWork.effectTag & Update) {
          const type = finishedWork.type;
          const props = finishedWork.memoizedProps;
          commitMount(instance, type, props, finishedWork);
        }
  
        return;
      }
      case HostText: {
        // We have no life-cycles associated with text.
        return;
      }
      case HostPortal: {
        // We have no life-cycles associated with portals.
        return;
      }
      case Profiler: {
        if (enableProfilerTimer) {
          const onRender = finishedWork.memoizedProps.onRender;
  
          if (enableSchedulerTracking) {
            onRender(
              finishedWork.memoizedProps.id,
              current === null ? 'mount' : 'update',
              finishedWork.actualDuration,
              finishedWork.treeBaseDuration,
              finishedWork.actualStartTime,
              getCommitTime(),
              finishedRoot.memoizedInteractions,
            );
          } else {
            onRender(
              finishedWork.memoizedProps.id,
              current === null ? 'mount' : 'update',
              finishedWork.actualDuration,
              finishedWork.treeBaseDuration,
              finishedWork.actualStartTime,
              getCommitTime(),
            );
          }
        }
        return;
      }
      case PlaceholderComponent: {
        if (enableSuspense) {
          if ((finishedWork.mode & StrictMode) === NoEffect) {
            // In loose mode, a placeholder times out by scheduling a synchronous
            // update in the commit phase. Use `updateQueue` field to signal that
            // the Timeout needs to switch to the placeholder. We don't need an
            // entire queue. Any non-null value works.
            // $FlowFixMe - Intentionally using a value other than an UpdateQueue.
            finishedWork.updateQueue = emptyObject;
            scheduleWork(finishedWork, Sync);
          } else {
            // In strict mode, the Update effect is used to record the time at
            // which the placeholder timed out.
            const currentTime = requestCurrentTime();
            finishedWork.stateNode = {timedOutAt: currentTime};
          }
        }
        return;
      }
      default: {
        invariant(
          false,
          'This unit of work tag should not have side-effects. This error is ' +
            'likely caused by a bug in React. Please file an issue.',
        );
      }
    }
  }
  
  function commitAttachRef(finishedWork: Fiber) {
    const ref = finishedWork.ref;
    if (ref !== null) {
      const instance = finishedWork.stateNode;
      let instanceToUse;
      switch (finishedWork.tag) {
        case HostComponent:
          instanceToUse = getPublicInstance(instance);
          break;
        default:
          instanceToUse = instance;
      }
      if (typeof ref === 'function') {
        ref(instanceToUse);
      } else {
        if (__DEV__) {
          if (!ref.hasOwnProperty('current')) {
            warningWithoutStack(
              false,
              'Unexpected ref object provided for %s. ' +
                'Use either a ref-setter function or React.createRef().%s',
              getComponentName(finishedWork.type),
              getStackByFiberInDevAndProd(finishedWork),
            );
          }
        }
  
        ref.current = instanceToUse;
      }
    }
  }
  
  function commitDetachRef(current: Fiber) {
    const currentRef = current.ref;
    if (currentRef !== null) {
      if (typeof currentRef === 'function') {
        currentRef(null);
      } else {
        currentRef.current = null;
      }
    }
  }
  
  // User-originating errors (lifecycles and refs) should not interrupt
  // deletion, so don't let them throw. Host-originating errors should
  // interrupt deletion, so it's okay
  function commitUnmount(current: Fiber): void {
    onCommitUnmount(current);
  
    switch (current.tag) {
      case ClassComponent:
      case ClassComponentLazy: {
        safelyDetachRef(current);
        const instance = current.stateNode;
        if (typeof instance.componentWillUnmount === 'function') {
          safelyCallComponentWillUnmount(current, instance);
        }
        return;
      }
      case HostComponent: {
        safelyDetachRef(current);
        return;
      }
      case HostPortal: {
        // TODO: this is recursive.
        // We are also not using this parent because
        // the portal will get pushed immediately.
        if (supportsMutation) {
          unmountHostComponents(current);
        } else if (supportsPersistence) {
          emptyPortalContainer(current);
        }
        return;
      }
    }
  }
  
  function commitNestedUnmounts(root: Fiber): void {
    // While we're inside a removed host node we don't want to call
    // removeChild on the inner nodes because they're removed by the top
    // call anyway. We also want to call componentWillUnmount on all
    // composites before this host node is removed from the tree. Therefore
    // we do an inner loop while we're still inside the host node.
    let node: Fiber = root;
    while (true) {
      commitUnmount(node);
      // Visit children because they may contain more composite or host nodes.
      // Skip portals because commitUnmount() currently visits them recursively.
      if (
        node.child !== null &&
        // If we use mutation we drill down into portals using commitUnmount above.
        // If we don't use mutation we drill down into portals here instead.
        (!supportsMutation || node.tag !== HostPortal)
      ) {
        node.child.return = node;
        node = node.child;
        continue;
      }
      if (node === root) {
        return;
      }
      while (node.sibling === null) {
        if (node.return === null || node.return === root) {
          return;
        }
        node = node.return;
      }
      node.sibling.return = node.return;
      node = node.sibling;
    }
  }
  
  function detachFiber(current: Fiber) {
    // Cut off the return pointers to disconnect it from the tree. Ideally, we
    // should clear the child pointer of the parent alternate to let this
    // get GC:ed but we don't know which for sure which parent is the current
    // one so we'll settle for GC:ing the subtree of this child. This child
    // itself will be GC:ed when the parent updates the next time.
    current.return = null;
    current.child = null;
    if (current.alternate) {
      current.alternate.child = null;
      current.alternate.return = null;
    }
  }
  
  function emptyPortalContainer(current: Fiber) {
    if (!supportsPersistence) {
      return;
    }
  
    const portal: {containerInfo: Container, pendingChildren: ChildSet} =
      current.stateNode;
    const {containerInfo} = portal;
    const emptyChildSet = createContainerChildSet(containerInfo);
    replaceContainerChildren(containerInfo, emptyChildSet);
  }
  
  function commitContainer(finishedWork: Fiber) {
    if (!supportsPersistence) {
      return;
    }
  
    switch (finishedWork.tag) {
      case ClassComponent:
      case ClassComponentLazy: {
        return;
      }
      case HostComponent: {
        return;
      }
      case HostText: {
        return;
      }
      case HostRoot:
      case HostPortal: {
        const portalOrRoot: {
          containerInfo: Container,
          pendingChildren: ChildSet,
        } =
          finishedWork.stateNode;
        const {containerInfo, pendingChildren} = portalOrRoot;
        replaceContainerChildren(containerInfo, pendingChildren);
        return;
      }
      default: {
        invariant(
          false,
          'This unit of work tag should not have side-effects. This error is ' +
            'likely caused by a bug in React. Please file an issue.',
        );
      }
    }
  }
  
  function getHostParentFiber(fiber: Fiber): Fiber {
    let parent = fiber.return;
    while (parent !== null) {
      if (isHostParent(parent)) {
        return parent;
      }
      parent = parent.return;
    }
    invariant(
      false,
      'Expected to find a host parent. This error is likely caused by a bug ' +
        'in React. Please file an issue.',
    );
  }
  
  function isHostParent(fiber: Fiber): boolean {
    return (
      fiber.tag === HostComponent ||
      fiber.tag === HostRoot ||
      fiber.tag === HostPortal
    );
  }
  
  function getHostSibling(fiber: Fiber): ?Instance {
    // We're going to search forward into the tree until we find a sibling host
    // node. Unfortunately, if multiple insertions are done in a row we have to
    // search past them. This leads to exponential search for the next sibling.
    // TODO: Find a more efficient way to do this.
    let node: Fiber = fiber;
    siblings: while (true) {
      // If we didn't find anything, let's try the next sibling.
      while (node.sibling === null) {
        if (node.return === null || isHostParent(node.return)) {
          // If we pop out of the root or hit the parent the fiber we are the
          // last sibling.
          return null;
        }
        node = node.return;
      }
      node.sibling.return = node.return;
      node = node.sibling;
      while (node.tag !== HostComponent && node.tag !== HostText) {
        // If it is not host node and, we might have a host node inside it.
        // Try to search down until we find one.
        if (node.effectTag & Placement) {
          // If we don't have a child, try the siblings instead.
          continue siblings;
        }
        // If we don't have a child, try the siblings instead.
        // We also skip portals because they are not part of this host tree.
        if (node.child === null || node.tag === HostPortal) {
          continue siblings;
        } else {
          node.child.return = node;
          node = node.child;
        }
      }
      // Check if this host node is stable or about to be placed.
      if (!(node.effectTag & Placement)) {
        // Found it!
        return node.stateNode;
      }
    }
  }
  
  function commitPlacement(finishedWork: Fiber): void {
    if (!supportsMutation) {
      return;
    }
  
    // Recursively insert all host nodes into the parent.
    const parentFiber = getHostParentFiber(finishedWork);
  
    // Note: these two variables *must* always be updated together.
    let parent;
    let isContainer;
  
    switch (parentFiber.tag) {
      case HostComponent:
        parent = parentFiber.stateNode;
        isContainer = false;
        break;
      case HostRoot:
        parent = parentFiber.stateNode.containerInfo;
        isContainer = true;
        break;
      case HostPortal:
        parent = parentFiber.stateNode.containerInfo;
        isContainer = true;
        break;
      default:
        invariant(
          false,
          'Invalid host parent fiber. This error is likely caused by a bug ' +
            'in React. Please file an issue.',
        );
    }
    if (parentFiber.effectTag & ContentReset) {
      // Reset the text content of the parent before doing any insertions
      resetTextContent(parent);
      // Clear ContentReset from the effect tag
      parentFiber.effectTag &= ~ContentReset;
    }
  
    const before = getHostSibling(finishedWork);
    // We only have the top Fiber that was inserted but we need recurse down its
    // children to find all the terminal nodes.
    let node: Fiber = finishedWork;
    while (true) {
      if (node.tag === HostComponent || node.tag === HostText) {
        if (before) {
          if (isContainer) {
            insertInContainerBefore(parent, node.stateNode, before);
          } else {
            insertBefore(parent, node.stateNode, before);
          }
        } else {
          if (isContainer) {
            appendChildToContainer(parent, node.stateNode);
          } else {
            appendChild(parent, node.stateNode);
          }
        }
      } else if (node.tag === HostPortal) {
        // If the insertion itself is a portal, then we don't want to traverse
        // down its children. Instead, we'll get insertions from each child in
        // the portal directly.
      } else if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      }
      if (node === finishedWork) {
        return;
      }
      while (node.sibling === null) {
        if (node.return === null || node.return === finishedWork) {
          return;
        }
        node = node.return;
      }
      node.sibling.return = node.return;
      node = node.sibling;
    }
  }
  
  function unmountHostComponents(current): void {
    // We only have the top Fiber that was deleted but we need recurse down its
    // children to find all the terminal nodes.
    let node: Fiber = current;
  
    // Each iteration, currentParent is populated with node's host parent if not
    // currentParentIsValid.
    let currentParentIsValid = false;
  
    // Note: these two variables *must* always be updated together.
    let currentParent;
    let currentParentIsContainer;
  
    while (true) {
      if (!currentParentIsValid) {
        let parent = node.return;
        findParent: while (true) {
          invariant(
            parent !== null,
            'Expected to find a host parent. This error is likely caused by ' +
              'a bug in React. Please file an issue.',
          );
          switch (parent.tag) {
            case HostComponent:
              currentParent = parent.stateNode;
              currentParentIsContainer = false;
              break findParent;
            case HostRoot:
              currentParent = parent.stateNode.containerInfo;
              currentParentIsContainer = true;
              break findParent;
            case HostPortal:
              currentParent = parent.stateNode.containerInfo;
              currentParentIsContainer = true;
              break findParent;
          }
          parent = parent.return;
        }
        currentParentIsValid = true;
      }
  
      if (node.tag === HostComponent || node.tag === HostText) {
        commitNestedUnmounts(node);
        // After all the children have unmounted, it is now safe to remove the
        // node from the tree.
        if (currentParentIsContainer) {
          removeChildFromContainer((currentParent: any), node.stateNode);
        } else {
          removeChild((currentParent: any), node.stateNode);
        }
        // Don't visit children because we already visited them.
      } else if (node.tag === HostPortal) {
        // When we go into a portal, it becomes the parent to remove from.
        // We will reassign it back when we pop the portal on the way up.
        currentParent = node.stateNode.containerInfo;
        currentParentIsContainer = true;
        // Visit children because portals might contain host components.
        if (node.child !== null) {
          node.child.return = node;
          node = node.child;
          continue;
        }
      } else {
        commitUnmount(node);
        // Visit children because we may find more host components below.
        if (node.child !== null) {
          node.child.return = node;
          node = node.child;
          continue;
        }
      }
      if (node === current) {
        return;
      }
      while (node.sibling === null) {
        if (node.return === null || node.return === current) {
          return;
        }
        node = node.return;
        if (node.tag === HostPortal) {
          // When we go out of the portal, we need to restore the parent.
          // Since we don't keep a stack of them, we will search for it.
          currentParentIsValid = false;
        }
      }
      node.sibling.return = node.return;
      node = node.sibling;
    }
  }
  
  function commitDeletion(current: Fiber): void {
    if (supportsMutation) {
      // Recursively delete all host nodes from the parent.
      // Detach refs and call componentWillUnmount() on the whole subtree.
      unmountHostComponents(current);
    } else {
      // Detach refs and call componentWillUnmount() on the whole subtree.
      commitNestedUnmounts(current);
    }
    detachFiber(current);
  }
  
  function commitWork(current: Fiber | null, finishedWork: Fiber): void {
    if (!supportsMutation) {
      commitContainer(finishedWork);
      return;
    }
  
    switch (finishedWork.tag) {
      case ClassComponent:
      case ClassComponentLazy: {
        return;
      }
      case HostComponent: {
        const instance: Instance = finishedWork.stateNode;
        if (instance != null) {
          // Commit the work prepared earlier.
          const newProps = finishedWork.memoizedProps;
          // For hydration we reuse the update path but we treat the oldProps
          // as the newProps. The updatePayload will contain the real change in
          // this case.
          const oldProps = current !== null ? current.memoizedProps : newProps;
          const type = finishedWork.type;
          // TODO: Type the updateQueue to be specific to host components.
          const updatePayload: null | UpdatePayload = (finishedWork.updateQueue: any);
          finishedWork.updateQueue = null;
          if (updatePayload !== null) {
            commitUpdate(
              instance,
              updatePayload,
              type,
              oldProps,
              newProps,
              finishedWork,
            );
          }
        }
        return;
      }
      case HostText: {
        invariant(
          finishedWork.stateNode !== null,
          'This should have a text node initialized. This error is likely ' +
            'caused by a bug in React. Please file an issue.',
        );
        const textInstance: TextInstance = finishedWork.stateNode;
        const newText: string = finishedWork.memoizedProps;
        // For hydration we reuse the update path but we treat the oldProps
        // as the newProps. The updatePayload will contain the real change in
        // this case.
        const oldText: string =
          current !== null ? current.memoizedProps : newText;
        commitTextUpdate(textInstance, oldText, newText);
        return;
      }
      case HostRoot: {
        return;
      }
      case Profiler: {
        return;
      }
      case PlaceholderComponent: {
        return;
      }
      default: {
        invariant(
          false,
          'This unit of work tag should not have side-effects. This error is ' +
            'likely caused by a bug in React. Please file an issue.',
        );
      }
    }
  }
  
  function commitResetTextContent(current: Fiber) {
    if (!supportsMutation) {
      return;
    }
    resetTextContent(current.stateNode);
  }
  
  export {
    commitBeforeMutationLifeCycles,
    commitResetTextContent,
    commitPlacement,
    commitDeletion,
    commitWork,
    commitLifeCycles,
    commitAttachRef,
    commitDetachRef,
  };
  