code: function UMLMessage() {
          UMLDirectedRelationship.apply(this, arguments);
  
          /** @member {string} */
          this.messageSort = MS_SYNCHCALL;
  
          /** @member {UMLOperation} */
          this.signature = null;
  
          /** @member {UMLConnector} */
          this.connector = null;
  
          /** @member {string} */
          this["arguments"] = '';
  
          /** @member {string} */
          this.assignmentTarget = '';
  
          /** @member {string} */
          this.guard = '';
  
          /** @member {string} */
          this.iteration = '';
  
          /** @member {boolean} */
          this.isConcurrentIteration = false;
      }
docs: UMLMessage
  @constructor
  @extends UMLDirectedRelationship