Adds a condition for a specified non-key attribute that consists
            of an operator and any number of AttributeValues.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public void AddCondition( string nonKeyAttributeName, ScanOperator op, List<AttributeValue> values )
 Parameters
 Parameters- nonKeyAttributeName (String)
- Target non-key attribute name
- op (ScanOperator)
- Comparison operator
- values (List<(Of <(<'AttributeValue>)>)>)
- AttributeValues to compare to