text: // Copyright 2019 Google
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #import "FIRCLSFABAsyncOperation.h"
  
  @interface FIRCLSFABAsyncOperation (Private)
  
  /**
   * Subclasses must call this method when they are done performing work. When it is called is up to
   * you; it can be directly after kicking of a network request, say, or in the callback for its
   * response. Once this method is called, the operation queue it is on will begin executing the next
   * waiting operation. If you directly invoked -[start] on the instance, execution will proceed to
   * the next code statement.
   * @note as soon as this method is called, @c NSOperation's standard @c completionBlock will be
   * executed if one exists, as a result of setting the operation's isFinished property to YES, and
   * the asyncCompletion block is called.
   * @param error Any error to pass to asyncCompletion, or nil if there is none.
   */
  - (void)finishWithError:(NSError *__nullable)error;
  
  @end
  