docs: private String getDecodeMethodCode() {
          StringBuilder code = new StringBuilder();
  
          code.append("public ").append(ClassHelper.getInternalName(cls.getCanonicalName()));
          code.append(" decode(byte[] bb) throws IOException {").append(LINE_BREAK);
          code.append("CodedInputStream input = CodedInputStream.newInstance(bb, 0, bb.length)").append(JAVA_LINE_BREAK);
          getParseBytesMethodCode(code);
          return code.toString();
      }