frameIdInteger - The ID of the renderer frame that sent this message
returnValueany - Set this to the value to be returned in a synchronous message
senderWebContents - Returns the
webContentsthat sent the message
portsMessagePortMain - A list of MessagePorts that were transferred with this message
replyFunction - A function that will send an IPC message to the renderer frame that sent the original message that you are currently handling. You should use this method to "reply" to the sent message in order to guarantee the reply will go to the correct process and frame.
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