get_pending_message_id

Description:

[ Version ( since = "0.15.3" ) ]
public uint32 get_pending_message_id (out bool valid)

Return the incoming message ID of this.

Only incoming messages have such ID, for outgoing ones this function returns 0 and set valid to false.

this	a message
valid	either `null`, or a location in which to store `true` if this contains a pending message ID.

the incoming message ID.