def _all_arcs(self):
        arcs = set()
        for bp in self.child_parsers():
            arcs.update(bp._arcs())

        return arcs
Returns the concrete schema being referenced by this instance.
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/coverage/parser.py/ByteParser._all_arcs--crossover with--dataset/ETHPy150Open google/apis-client-generator/src/googleapis/codegen/data_types.py/SchemaReference.referenced_schema