---title:"mg_printf_websocket_frame()"decl_name:"mg_printf_websocket_frame"symbol_kind:"func"signature:|void mg_printf_websocket_frame(struct mg_connection *nc, int op_and_flags,const char *fmt, ...);---Send websocket frame to the remote end.Like `mg_send_websocket_frame()`, but allows to create formatted messagewith `printf()`-like semantics.