REF: Reduce duplicative methods between XML parser classes (#47553)
REF: Reduce duplicative methods between XML parser classes (#47553)

* REF: Reduce duplicative methods between XML parser classes

* Add typing to base class methods
datapythonista/pandas,pandas-dev/pandas,pandas-dev/pandas,datapythonista/pandas,datapythonista/pandas,datapythonista/pandas,pandas-dev/pandas,pandas-dev/pandas