question: private PropertyMapping populatePropertyMapping ( ExtensionProperty ep ) { PropertyMapping pm = mapping . getField ( ep . getQualname ( ) ) ; if ( pm == null ) { pm = new PropertyMapping ( ) ; } pm . setTerm ( ep ) ; return pm ; }
target:  Populate a PropertyMapping from an ExtensionProperty. If the ExtensionProperty is already mapped, preserves the existing PropertyMapping. Otherwise, creates a brand new PropertyMapping.