internal AttributeMappingTable(AttributeMapping.AttributeMappingEntity entity, TableBaseAttribute attribute)
 {
     this.entity    = entity;
     this.attribute = attribute;
 }
 internal AttributeMappingMember(MemberInfo member, MemberAttribute attribute, AttributeMapping.AttributeMappingEntity nested)
 {
     this.member    = member;
     this.attribute = attribute;
     this.nested    = nested;
 }