Field required on setup DAC

AASetup.cs

  public abstract class timeRequestApproval :    BqlBool.Field<timeRequestApproval>
  {
  }
  [EPRequireApproval]
  [PXDefault(false, PersistingCheck = PXPersistingCheck.Null)]
  [PXUIField(DisplayName = "Time Request Approval Map")]
  public virtual bool? TimeRequestApproval { get; set; }