def dst_to_src(self,dst_file):
        for map in self.mappings:
            src_uri = map.dst_to_src(dst_file)
            if (src_uri is not None):
                return(src_uri)
        # Must have failed if loop exited
        raise MapperError("Unable to translate destination path (%s) into a source URI." % (dst_file))
Matches all checkbox input elements::
dataset/ETHPy150Open resync/resync/resync/mapper.py/Mapper.dst_to_src--crossover with--dataset/ETHPy150Open gawel/pyquery/pyquery/cssselectpatch.py/JQueryTranslator.xpath_checkbox_pseudo