Function r2r_rcl::rcl_wait_for_subscribers

pub unsafe extern "C" fn rcl_wait_for_subscribers(
    node: *const rcl_node_t,
    allocator: *mut rcl_allocator_t,
    topic_name: *const c_char,
    count: usize,
    timeout: rcutils_duration_value_t,
    success: *mut bool,
) -> rcl_ret_t