WebProcessExtension.connectUserMessageReceived

gulong connectUserMessageReceived(T)(T callback,  Flag!"After" after =  No.After) if (isCallable!T
    &&  is(ReturnType!T ==  void)
   && (Parameters!T.length <  1 || (ParameterStorageClassTuple!T[0]  ==  ParameterStorageClass.none &&  is(Parameters!T[0] :  webkitwebprocessextension.user_message.UserMessage)))
   && (Parameters!T.length <  2 || (ParameterStorageClassTuple!T[1]  ==  ParameterStorageClass.none &&  is(Parameters!T[1] :  webkitwebprocessextension.web_process_extension.WebProcessExtension)))
   &&  Parameters!T.length <  3)

Connect to UserMessageReceived signal.

This signal is emitted when a #WebKitUserMessage is received from the #WebKitWebContext corresponding to extension. Messages sent by #WebKitWebContext are always broadcasted to all web extensions and they can't be replied to. Calling [webkitwebprocessextension.user_message.UserMessage.sendReply] will do nothing.

Parameters

`callback`	signal callback delegate or function to connect `void callback(webkitwebprocessextension.user_message.UserMessage message, webkitwebprocessextension.web_process_extension.WebProcessExtension webProcessExtension)` `message` the #WebKitUserMessage received (optional) `webProcessExtension` the instance the signal is connected to (optional)
`after`	Yes.After to execute callback after default handler, No.After to execute before (default)

Returns

Signal ID