pub unsafe extern "system" fn alljoyn_proxybusobject_getpropertyasync(
    proxyobj: alljoyn_proxybusobject,
    iface: PCSTR,
    property: PCSTR,
    callback: alljoyn_proxybusobject_listener_getpropertycb_ptr,
    timeout: u32,
    context: *mut c_void,
) -> QStatus