def importFile(self, srcUrl):
        url = urlparse.urlparse(srcUrl)
        return self._importFile(findJobStoreForUrl(url), url)
Mutator by field name.  Then need to store the field.
dataset/ETHPy150Open BD2KGenomics/toil/src/toil/jobStores/abstractJobStore.py/AbstractJobStore.importFile--crossover with--dataset/ETHPy150Open neurodata/ndstore/ocpca/batchAnnotation.py/BatchAnnotation.setField