code: protected void analyzeBodyMeta(Postcard postcard, String bodyFile, String plainText) {
          // _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
          // /*
          //  [New Member's Registration]
          //  The member will be formalized after click.
          // */
          // subject: Welcome to your sign up, /*pmb.memberName*/
          // >>>
          // Hello, /*pmb.memberName*/
          // ...
          // _/_/_/_/_/_/_/_/_/_/
          final String delimiter = META_DELIMITER;
          if (plainText.contains(delimiter)) {
              verifyFormat(bodyFile, plainText, delimiter);
          }
          final String meta = Srl.replace(Srl.substringFirstFront(plainText, delimiter), CRLF, LF);
          final ScopeInfo optionScope = Srl.extractScopeFirst(meta, OPTION_LABEL, LF);
          if (optionScope != null && optionScope.getContent().contains(PLUS_HTML_OPTION)) {
              postcard.officePlusHtml();
          }
      }
docs: ===============