Defines the length of time, in days, before noncurrent versions expire.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public LifecycleRuleNoncurrentVersionExpiration NoncurrentVersionExpiration { get; set; }
 Declaration Syntax
 Declaration Syntax| C# | 
public LifecycleRuleNoncurrentVersionExpiration NoncurrentVersionExpiration { get; set; }