@Nullable
  private static String extractContentTypeValue(@NotNull String contentType) {
    int eqPos = contentType.indexOf("=");
    if (eqPos > 0) {
      String result = contentType.substring(eqPos + 1).trim();
      result = StringUtil.trimStart(result, "\"");
      result = StringUtil.trimEnd(result, "\"");
      if (!result.startsWith("dyn.")) return result;
    }
    return null;
  }
@Nullable
  private static String extractContentTypeValue(@NotNull String contentType)