Add methods to get the column for key path and key path for column.
Add methods to get the column for key path and key path for column.

openxal/openxal,luxiaohan/openxal-csns-luxh,openxal/openxal,openxal/openxal,luxiaohan/openxal-csns-luxh,EuropeanSpallationSource/openxal,EuropeanSpallationSource/openxal,luxiaohan/openxal-csns-luxh,EuropeanSpallationSource/openxal,EuropeanSpallationSource/openxal,openxal/openxal,EuropeanSpallationSource/openxal,openxal/openxal,luxiaohan/openxal-csns-luxh