method Namespace.prototype._addimport { Namespace } from "https://deno.land/x/socket_io@0.2.0/packages/socket.io/lib/namespace.ts"; _add(client: Client<ListenEvents, EmitEvents, ServerSideEvents, SocketData>,handshake: Handshake,callback: (socket: Socket<ListenEvents, EmitEvents, ServerSideEvents, SocketData>) => void,)Adds a new client Parametersclient: Client<ListenEvents, EmitEvents, ServerSideEvents, SocketData> the client handshake: Handshake the handshake callback: (socket: Socket<ListenEvents, EmitEvents, ServerSideEvents, SocketData>) => void