(self, *, event_message: EventMessage, client: "BusClient")
Called before an event to sent onto the bus

        `event_message` is mutable and may therefore be changed prior to being sent
Called before an event to sent onto the bus
Called before an event to sent onto the bus
async def before_event_sent(self, *, event_message: EventMessage, client: "BusClient"):
        """Called before an event to sent onto the bus

        `event_message` is mutable and may therefore be changed prior to being sent
        """
        pass
async def before_event_sent ( self , * , event_message : EventMessage , client : "BusClient" ) : pass