resetElements 
  A complex type that contains one ResettableElementName element for each element that you want to reset to the default value. Valid values for ResettableElementName include the following:
- ChildHealthChecks: Amazon Route 53 resets ChildHealthChecks to null.
- FullyQualifiedDomainName: Route 53 resets FullyQualifiedDomainName. to null.
- Regions: Route 53 resets the Regions list to the default set of regions.
- ResourcePath: Route 53 resets ResourcePath to null.