code: public void addInterfaceType(DescriptionType descriptionType)
      {
          // Create the interfaces
          InterfaceType interfaceType = wsdlFactory.createInterfaceType();
          descriptionType.getImportOrIncludeOrTypes().add(wsdlFactory.createInterface(interfaceType));
          String interfaceName = this.getControlProperty(MessageControl.INTERFACE_NAME);
          interfaceType.setName(interfaceName);
          
          this.addInterfaceOperationTypes(interfaceType);
      }
docs: AddInterfaceType Method.