question: public void makeImmutable ( ) { if ( mutable ) { if ( attrValues != null ) { attrValues = Collections . unmodifiableList ( attrValues ) ; } if ( valueStrings != null ) { valueStrings = Collections . unmodifiableList ( valueStrings ) ; } if ( anyMap != null ) { anyMap = Collections . unmodifiableMap ( anyMap ) ; } mutable = false ; } }
target:  Makes the object immutable.