Function polkit_sys::polkit_authority_unregister_authentication_agent_sync

pub unsafe extern "C" fn polkit_authority_unregister_authentication_agent_sync(
    authority: *mut PolkitAuthority, 
    subject: *mut PolkitSubject, 
    object_path: *const c_char, 
    cancellable: *mut GCancellable, 
    error: *mut *mut GError
) -> gboolean