def add_select(self, *column):
        if not column:
            column = []

        self.columns += column

        return self
gc - print out garbage collection information
dataset/ETHPy150Open sdispater/orator/orator/query/builder.py/QueryBuilder.add_select--crossover with--dataset/ETHPy150Open JoelBender/bacpypes/py34/bacpypes/consolecmd.py/ConsoleCmd.do_gc