Function libsystemd_sys::bus::sd_bus_add_node_enumerator

pub unsafe extern "C" fn sd_bus_add_node_enumerator(
    bus: *mut sd_bus, 
    slot: *mut *mut sd_bus_slot, 
    path: *const c_char, 
    callback: sd_bus_node_enumerator_t, 
    userdata: *mut c_void
) -> c_int