Update a document in DynamoDB, using specified config.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public Document UpdateItem( Document doc, UpdateItemOperationConfig config )
 Parameters
 Parameters- doc (Document)
- Document to update.
- config (UpdateItemOperationConfig)
- Configuration to use.
 Return Value
 Return ValueNull or updated attributes, depending on config.
 See Also
 See Also