@Nullable
  public static String getTextBlockText(PsiLiteralExpression expression) {
    String[] lines = getTextBlockLines(expression);
    if (lines == null) return null;

    int prefix = getTextBlockIndent(lines);

    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < lines.length; i++) {
      String line = lines[i];
      if (!line.isEmpty()) {
        sb.append(trimTrailingWhitespaces(line.substring(prefix)));
      }
      if (i < lines.length - 1) {
        sb.append('\n');
      }
    }
    return sb.toString();
  }
@Nullable
  public static String getTextBlockText(PsiLiteralExpression expression)