@Nullable
  private Match checkMatch(final int oldClassNameIndex, final int propertyNameIndex, final String propertyWord) {
    if (propertyWord.equalsIgnoreCase(myOldClassName[oldClassNameIndex])) {
      return new Match(oldClassNameIndex, propertyNameIndex, propertyWord);
    }
    else {
      return null;
    }
  }
@Nullable
  private Match checkMatch(final int oldClassNameIndex, final int propertyNameIndex, final String propertyWord)