Add private define method for constants
Add private define method for constants

ekandreas/papi,nlemoine/papi,wp-papi/papi,wp-papi/papi,isotopsweden/wp-papi,ekandreas/papi,nlemoine/papi,nlemoine/papi,wp-papi/papi,ekandreas/papi,isotopsweden/wp-papi,isotopsweden/wp-papi