def iterblobs(self):
        for path in self:
            entry = self[path]
            yield path, entry[-2], cleanup_mode(entry[-6])
Returns pygment's lexer class. Would try to guess lexer taking file's
dataset/ETHPy150Open natestedman/Observatory/observatory/lib/dulwich/index.py/Index.iterblobs--crossover with--dataset/ETHPy150Open codeinn/vcs/vcs/nodes.py/FileNode.lexer