pub unsafe extern "C" fn sd_bus_call_method_async( bus: *mut sd_bus, slot: *mut *mut sd_bus_slot, destination: *const c_char, path: *const c_char, interface: *const c_char, member: *const c_char, callback: sd_bus_message_handler_t, userdata: *mut c_void, types: *const c_char, ...) -> c_int
