code: public void setReturnType(JvmTypeReference newReturnType)
  	{
  		if (newReturnType != returnType)
  		{
  			NotificationChain msgs = null;
  			if (returnType != null)
  				msgs = ((InternalEObject)returnType).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - TypesPackage.JVM_OPERATION__RETURN_TYPE, null, msgs);
  			if (newReturnType != null)
  				msgs = ((InternalEObject)newReturnType).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - TypesPackage.JVM_OPERATION__RETURN_TYPE, null, msgs);
  			msgs = basicSetReturnType(newReturnType, msgs);
  			if (msgs != null) msgs.dispatch();
  		}
  		else if (eNotificationRequired())
  			eNotify(new ENotificationImpl(this, Notification.SET, TypesPackage.JVM_OPERATION__RETURN_TYPE, newReturnType, newReturnType));
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated