code: private void generateModelEnum(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {
          // 枚举跟随字段走
          for (Field field : topLevelClass.getFields()) {
              if (this.enumColumns.get(field.getName()) != null) {
                  InnerEnum innerEnum = this.enumColumns.get(field.getName()).generateEnum(commentGenerator, introspectedTable);
                  topLevelClass.addInnerEnum(innerEnum);
              }
          }
      }
docs: 生成对应enum
  @param topLevelClass
  @param introspectedTable