code: protected void analysisSequence(Class<ENTITY> entityClass) {
          Sequence sequence = entityClass.getAnnotation(Sequence.class);
          if (sequence != null) {
              this.sequenceName = sequence.name();
              sequenceGenerator.initialSequence(sequenceName, sequence.size());
          }
      }
docs: 解析映射的实体类，获取主键名、表名、分片数、sequence配置
  
  @param