Function rcl_sys::rcl::subscription::rcl_take_loaned_message

pub unsafe extern "C" fn rcl_take_loaned_message(
    subscription: *const rcl_subscription_t, 
    loaned_message: *mut *mut c_void, 
    message_info: *mut rmw_message_info_t, 
    allocation: *mut rmw_subscription_allocation_t
) -> rcl_ret_t

“ Take a loaned message from a topic using a rcl subscription.