def buildStop(self, command, tokens, index):
        self.verifyCurrentContext(tokens, index) #currentStore, currentFramer, currentFrame exist

        try:
            tasker = tokens[index]
            index +=1

            self.verifyName(tasker, command, tokens, index)

        except IndexError:
            msg = "Error building %s. Not enough tokens." % (command,)
            raise excepting.ParseError(msg, tokens, index)

        if index != len(tokens):
            msg = "Error building %s. Unused tokens." % (command,)
            raise excepting.ParseError(msg, tokens, index)

        native = EXIT
        self.makeFiat(tasker, 'stop', native, command, tokens, index)

        return True
Validate node group name to be unique.
dataset/ETHPy150Open ioflo/ioflo/ioflo/base/building.py/Builder.buildStop--crossover with--dataset/ETHPy150Open openstack/fuel-web/nailgun/nailgun/api/v1/validators/node_group.py/NodeGroupValidator._validate_unique_name