* Unbinds event handlers for either all of a [WorldPacket] opcode's events, or one type of event. * * If `event_type` is `nil`, all the [WorldPacket] opcode's event handlers are cleared. * * Otherwise, only event handlers for `event_type` are cleared. * * @proto (opcode) * @proto (opcode, event_type) * @param uint32 opcode : the type of [WorldPacket] whose h
source not stored for this graph (policy: none)