@NotNull
  private String getNewDocumentText(@NotNull CharSequence documentText, @NotNull String newName) {
    TextRange prevOccurrence = null;
    StringBuilder result = new StringBuilder(documentText.length() + (newName.length() - myOldName.length()) * myOccurrences.size());
    for (TextRange occurrence : myOccurrences) {
      result.append(documentText.subSequence(prevOccurrence != null ? prevOccurrence.getEndOffset() : 0, occurrence.getStartOffset()));
      result.append(newName);
      prevOccurrence = occurrence;
    }
    result.append(documentText.subSequence(prevOccurrence != null ? prevOccurrence.getEndOffset() : 0, documentText.length()));
    return result.toString();
  }
@NotNull
  private String getNewDocumentText(@NotNull CharSequence documentText, @NotNull String newName)