@property
    def num_tables(self):
        return len([a for a in self.relations() if isinstance(a, Table)])
Get the split items defined for the widget.
dataset/ETHPy150Open coursera/dataduct/dataduct/database/database.py/Database.num_tables--crossover with--dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/qt_splitter.py/QtSplitter.split_items