def mappings(self, year=None):
        mappings = []
        for yr, elecs in self.elections(year).items():
            mappings.extend(self._build_metadata(yr, elecs))

        return mappings
Return array of dicts  containing source url and
dataset/ETHPy150Open openelections/openelections-core/openelex/us/il/datasource.py/Datasource.mappings