docs: public static List<String> getExtensions(final String pMIME) {
          String mime = bareMIME(StringUtil.toLowerCase(pMIME));
          if (mime.endsWith("/*")) {
              return getExtensionForWildcard(mime);
          }
          List<String> extensions = sMIMEToExt.get(mime);
          return maskNull(extensions);
      }