Function rcl_sys::rcl::graph::rcl_service_server_is_available

pub unsafe extern "C" fn rcl_service_server_is_available(
    node: *const rcl_node_t, 
    client: *const rcl_client_t, 
    is_available: *mut bool
) -> rcl_ret_t

Check if a service server is available for the given service client.