question: @ Override public StdTypeResolverBuilder typeProperty ( String typeIdPropName ) { if ( typeIdPropName == null || typeIdPropName . length ( ) == 0 ) { typeIdPropName = _idType . getDefaultPropertyName ( ) ; } _typeProperty = typeIdPropName ; return this ; }
target:  Method for constructing an instance with specified type property name (property name to use for type id when using "as-property" inclusion).