code: @Override
      public boolean validate(List<String> warnings) {
          // 获取配置的目标package
          Properties properties = getProperties();
          this.targetPackage = properties.getProperty(PRO_TARGET_PACKAGE);
          if (this.targetPackage == null){
              warnings.add("请配置com.itfsw.mybatis.generator.plugins.ExampleTargetPlugin插件的目标包名(targetPackage)！");
              return false;
          }
          return super.validate(warnings);
      }
docs: {@inheritDoc}