pub unsafe extern "C" fn virConnectRegisterCloseCallback(
conn: virConnectPtr,
cb: virConnectCloseFunc,
opaque: *mut c_void,
freecb: virFreeCallback,
) -> c_intpub unsafe extern "C" fn virConnectRegisterCloseCallback(
conn: virConnectPtr,
cb: virConnectCloseFunc,
opaque: *mut c_void,
freecb: virFreeCallback,
) -> c_int