def Validate(self, type_names):
    errs = [n for n in self._RDFTypes(type_names) if not self._GetClass(n)]
    if errs:
      raise DefinitionError("Undefined RDF Types: %s" % ",".join(errs))
Connectes the transport, will callback when done
dataset/ETHPy150Open google/grr/grr/lib/checks/filters.py/RDFFilter.Validate--crossover with--dataset/ETHPy150Open EricssonResearch/calvin-base/calvin/runtime/south/plugins/transports/base_transport.py/BaseTransport.connect