Convert DynamoDBEntry to PrimitiveList
            
 Declaration Syntax
 Declaration Syntax| C# | 
public PrimitiveList AsPrimitiveList()
 Return Value
 Return Value
            AsPrimitiveList if DynamoDBEntry is of AsPrimitiveList type; otherwise null
            
 Declaration Syntax
 Declaration Syntax| C# | 
public PrimitiveList AsPrimitiveList()
 Return Value
 Return Value