code: @Override
      public InitiateDocumentVersionUploadResult initiateDocumentVersionUpload(InitiateDocumentVersionUploadRequest request) {
          request = beforeClientExecution(request);
          return executeInitiateDocumentVersionUpload(request);
      }
docs: <p>
  Creates a new document object and version object.
  </p>
  <p>
  The client specifies the parent folder ID and name of the document to upload. The ID is optionally specified when
  creating a new version of an existing document. This is the first step to upload a document. Next, upload the
  document to the URL returned from the call, and then call <a>UpdateDocumentVersion</a>.
  </p>
  <p>
  To cancel the document upload, call <a>AbortDocumentVersionUpload</a>.
  </p>
  
  @param initiateDocumentVersionUploadRequest
  @return Result of the InitiateDocumentVersionUpload operation returned by the service.
  @throws EntityNotExistsException
  The resource does not exist.
  @throws EntityAlreadyExistsException
  The resource already exists.
  @throws StorageLimitExceededException
  The storage limit has been exceeded.
  @throws StorageLimitWillExceedException
  The storage limit will be exceeded.
  @throws ProhibitedStateException
  The specified document version is not in the INITIALIZED state.
  @throws UnauthorizedOperationException
  The operation is not permitted.
  @throws UnauthorizedResourceAccessException
  The caller does not have access to perform the action on the resource.
  @throws FailedDependencyException
  The AWS Directory Service cannot reach an on-premises instance. Or a dependency under the control of the
  organization is failing, such as a connected Active Directory.
  @throws ServiceUnavailableException
  One or more of the dependencies is unavailable.
  @throws DraftUploadOutOfSyncException
  This exception is thrown when a valid checkout ID is not presented on document version upload calls for a
  document that has been checked out from Web client.
  @throws ResourceAlreadyCheckedOutException
  The resource is already checked out.
  @sample AmazonWorkDocs.InitiateDocumentVersionUpload
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/workdocs-2016-05-01/InitiateDocumentVersionUpload"
  target="_top">AWS API Documentation</a>