send_message_to_view
Description:
[ Version ( since = "2.28" ) ]
public async UserMessage send_message_to_view (UserMessage message, Cancellable? cancellable) throws Error
  public async UserMessage send_message_to_view (UserMessage message, Cancellable? cancellable) throws Error
Send message to the WebKitWebView corresponding to this.
 If message is floating, it's consumed.
If you don't expect any reply, or you simply want to ignore it, you can pass null as callback. 
      When the operation is finished, callback will be called. You can then call send_message_to_view.end to 
      get the message reply.
Parameters:
| this | a WebPage | 
| message | |
| cancellable | a Cancellable or null to ignore | 
| callback | A TaskReadyCallback to call when the request is satisfied or null | 
| user_data | the data to pass to callback function |