assert(all(map(lambda x: isinstance(x, int), ver_expected))), \
f'invalid expected version "{ver_expected}" for VersionCheck (2)'
self.ver_expected = ver_expected
assert(all(map(lambda x: isinstance(x, int), ver_expected))), \
f'invalid expected version "{ver_expected}" for VersionCheck (2)'
self.ver_expected = ver_expected