def values(self):
        return [v for k, v in self._headers]
Traverses the tree in breadth-first top-down order,
dataset/ETHPy150Open babble/babble/include/jython/Lib/email/message.py/Message.values--crossover with--dataset/ETHPy150Open mikhaildubov/AST-text-analysis/east/asts/ast.py/AnnotatedSuffixTree.Node.traverse_breadth_first