Create new flow on this client.

def CreateFlow(self, name=None, args=None, runner_args=None):
    """Create new flow on this client."""

    if not name:
      raise ValueError("name can't be empty")

    request = flow_pb2.ApiCreateFlowArgs(client_id=self.client_id)

    request.flow.name = name
    if runner_args:
      request.flow.runner_args.CopyFrom(runner_args)

    if args:
      request.flow.args.value = args.SerializeToString()
      request.flow.args.type_url = utils.GetTypeUrl(args)

    data = self._context.SendRequest("CreateFlow", request)
    return flow.Flow(data=data, context=self._context)