Type Definition couchbase_sys::lcb_ioE_event_watch_fn

type lcb_ioE_event_watch_fn = Option<unsafe extern "C" fn(iops: lcb_io_opt_t, socket: lcb_socket_t, event: *mut c_void, evflags: c_short, uarg: *mut c_void, callback: lcb_ioE_callback) -> c_int>;