method Socket.prototype.setMulticastLoopback Usageimport { Socket } from "node:dgram"; Socket.prototype.setMulticastLoopback(flag: boolean): boolean Sets or clears the IP_MULTICAST_LOOP socket option. When set to true, multicast packets will also be received on the local interface. Sets or clears the IP_MULTICAST_LOOP socket option. When set to true, multicast packets will also be received on the local interface. This method throws EBADF if called on an unbound socket. Parameters flag: boolean Return Type boolean