public ReferenceExpression(FieldMember referencePoint, IMemberParentExpression owner)
     : base(referencePoint.Name, owner)
 {
     this.referencePoint = referencePoint;
 }
 public ReferenceExpression(FieldMember referencePoint)
     : base(referencePoint.Name, GetRootReference(referencePoint))
 {
     this.referencePoint = referencePoint;
 }