def maybe_prefetch_tree(self):
        if not hasattr(self, '_children'):
            self.prefetch_tree()
match the given regular expression object to the current text
dataset/ETHPy150Open fusionbox/django-widgy/widgy/models/base.py/Node.maybe_prefetch_tree--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Mako-0.8.1/mako/lexer.py/Lexer.match_reg