@abstractclassmethod
    def _writeToUrl(cls, readable, url):
        raise NotImplementedError()
compute a dataframe for each of the (ctx, node) pairs between
dataset/ETHPy150Open BD2KGenomics/toil/src/toil/jobStores/abstractJobStore.py/AbstractJobStore._writeToUrl--crossover with--dataset/ETHPy150Open manahl/mdf/mdf/viewer/frame.py/MDFViewerFrame.GetDataFrames