code: @SuppressWarnings("unchecked")
      @SneakyThrows
      public void init(final FillerRuleDefinitionEntity fillerRuleDefinitionEntity) {
          for (FillerRuleEntity each : fillerRuleDefinitionEntity.getRules()) {
              rules.put((Class<? extends SQLSegment>) Class.forName(each.getSqlSegmentClass()), (SQLSegmentFiller) Class.forName(each.getFillerClass()).newInstance());
          }
      }
docs: Initialize filler rule definition.
  
  @param fillerRuleDefinitionEntity filler rule definition entity