def ParseObjs(self, objs, type_names):
    for obj in objs:
      for type_name in self._RDFTypes(type_names):
        if isinstance(obj, self._GetClass(type_name)):
          yield obj
get the contents, assuming the node is a file
dataset/ETHPy150Open google/grr/grr/lib/checks/filters.py/RDFFilter.ParseObjs--crossover with--dataset/ETHPy150Open cournape/Bento/bento/core/node.py/Node.read