code: func (h *Helper) FindTableIndexOfRegion(allSchemas []*model.DBInfo, hotRange *RegionFrameRange) *FrameItem {
  	for _, db := range allSchemas {
  		for _, tbl := range db.Tables {
  			if f := hotRange.GetRecordFrame(tbl.ID, db.Name.O, tbl.Name.O); f != nil {
  				return f
  			}
  			for _, idx := range tbl.Indices {
  				if f := hotRange.GetIndexFrame(tbl.ID, idx.ID, db.Name.O, tbl.Name.O, idx.Name.O); f != nil {
  					return f
  				}
  			}
  		}
  	}
  	return nil
  }
docs: // FindTableIndexOfRegion finds what table is involved in this hot region. And constructs the new frame item for future use.