def grouped(self, size):
        return self._transform(transformations.grouped_t(_wrap, size))
Tests that David Eppstein's implementation of the Hopcroft--Karp
dataset/ETHPy150Open EntilZha/PyFunctional/functional/pipeline.py/Sequence.grouped--crossover with--dataset/ETHPy150Open networkx/networkx/networkx/algorithms/bipartite/tests/test_matching.py/TestMatching.test_eppstein_matching