code: function Operation(properties) {
                  if (properties)
                      for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                          if (properties[keys[i]] != null)
                              this[keys[i]] = properties[keys[i]];
              }
docs: Properties of an Operation.
  @memberof google.longrunning
  @interface IOperation
  @property {string|null} [name] Operation name
  @property {google.protobuf.IAny|null} [metadata] Operation metadata
  @property {boolean|null} [done] Operation done
  @property {google.rpc.IStatus|null} [error] Operation error
  @property {google.protobuf.IAny|null} [response] Operation response
   
  Constructs a new Operation.
  @memberof google.longrunning
  @classdesc Represents an Operation.
  @implements IOperation
  @constructor
  @param {google.longrunning.IOperation=} [properties] Properties to set