 class Amount{      String total //Total amount of something     String type  //Type of amount, Dollars, %, Times something     Bonification bonificationRate  //the amount can be "x times another bonification"      static belongsTo = [parentBonification: Bonification]      static mapping = {        table "AMOUNTS"        total column: "AMOU_TTOTAL"        type column: "AMOU_TTYPE"        parentBonification column: "BONI_CID"        bonificationRate column: "BONI_TRATE_CID"     }  }  class Bonification {       //among other things:       Amount amount 