documentId

Required. The ID to use for the Document, which will become the final component of the Document.name. If the caller does not have permission to create the Document, regardless of whether or not it exists, a PERMISSION_DENIED error is returned. This field must be unique among all Documents with the same parent. Otherwise, an ALREADY_EXISTS error is returned. This field must conform to RFC-1034 standard with a length limit of 63 characters. Otherwise, an INVALID_ARGUMENT error is returned.