original_string: public function appendContentStream(
          $repositoryId,
          & $objectId,
          StreamInterface $contentStream,
          $isLastChunk,
          & $changeToken = null,
          ExtensionDataInterface $extension = null
      ) {
          // TODO: Implement appendContentStream() method.
      }
code: public function appendContentStream(
          $repositoryId,
          & $objectId,
          StreamInterface $contentStream,
          $isLastChunk,
          & $changeToken = null,
          ExtensionDataInterface $extension = null
      ) {
          // TODO: Implement appendContentStream() method.
      }
code_tokens: public function appendContentStream ( $ repositoryId , & $ objectId , StreamInterface $ contentStream , $ isLastChunk , & $ changeToken = null , ExtensionDataInterface $ extension = null ) { // TODO: Implement appendContentStream() method. }
docstring: Appends the content stream to the content of the document.
  
  The stream in contentStream is consumed but not closed by this method.
  
  @param string $repositoryId the identifier for the repository
  @param string $objectId The identifier for the object. The repository might return a different/new object id
  @param StreamInterface $contentStream The content stream to append
  @param boolean $isLastChunk Indicates if this content stream is the last chunk
  @param string|null $changeToken The last change token of this object that the client received.
  The repository might return a new change token (default is <code>null</code>)
  @param ExtensionDataInterface|null $extension
docstring_tokens: Appends the content stream to the content of the document .