message: fix(playground): retain function calls over rpc
diff: @@ -4,7 +4,7 @@ import {
  DataTypeForExtensionCallback,
  ShopifyApi,
  } from '@shopify/app-extensions-renderer';
  -import {createRemoteRoot, RemoteChannel} from '@shopify/remote-ui-core';
  +import {createRemoteRoot, RemoteChannel, retain} from '@shopify/remote-ui-core';
  const registeredExtensions = new Map<
  ExtensionPoint,
  @@ -40,6 +40,8 @@ export function render<T extends ExtensionPoint>(
  return false;
  }
  + retain(channel);
  +
  const callback = registeredExtensions.get(extensionPoint)!;
  return callback(createRemoteRoot(channel, {components: components as any}), data);
  