def get_signature(self, typname, version=None):
        cls = self._load(typname, version)
        if cls is None:
            return None
        else:
            return self.form_signature(cls)
Return constructor argument signature for *typname,* using the
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/pkg_res_factory.py/PkgResourcesFactory.get_signature