def install_ui_colorscheme(self, name, style_dict):
        assert isinstance(name, six.text_type)
        assert isinstance(style_dict, dict)

        self.ui_styles[name] = style_dict
Get amount of nodes inside the tree.
dataset/ETHPy150Open jonathanslenders/ptpython/ptpython/python_input.py/PythonInput.install_ui_colorscheme--crossover with--dataset/ETHPy150Open conceptsandtraining/libtree/libtree/transaction.py/Transaction.get_tree_size