public void deleteField(FieldKey fieldKey) throws KeyNotFoundException {
  if (fieldKey.equals(FieldKey.COVER_ART)) {
    images.clear();
  }
 else {
    tag.deleteField(fieldKey);
  }
}

public void deleteField ( FieldKey fieldKey ) throws KeyNotFoundException { if ( fieldKey . equals ( FieldKey . COVER_ART ) ) { images . clear ( ) ; } else { tag . deleteField ( fieldKey ) ; } }
delete any instance of tag fields with this key
