Returning reason on socket close

[roycw]

Guys we have this code in the socket

socket.onclose = (e) => {
debug('msl:websocket:close')(${e.code})
if (e.code === CLOSE_GOING_AWAY) {
this.onServerClose && this.onServerClose()
}
// Terminate the streams.
incoming.push(null)
outgoing.end()
}

is there anyway we can pass the entire e object back to the onServerClose so we can send custom reasons?