WorldPacket packet; packet.readPackGUID();
void handlePacket(WorldPacket packet) { uint32_t opcode = packet.getOpcode(); switch(opcode) { case LOGIN_REQUEST: uint64_t guid = packet.readPackGUID(); // handle login request with GUID break; // more case statements for other opcodes } }This example shows how the `readPackGUID` method can be used to handle a specific packet type, in this case a login request. The GUID is read from the packet and used in the login request handling. Based on the use of the `WorldPacket` object and the presence of a specific opcode (`LOGIN_REQUEST`), it can be determined that the package library being used is likely related to network communication in a game or simulation environment.