Delete a document in DynamoDB, identified by a key, using specified configs.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public Document DeleteItem( IDictionary<string, DynamoDBEntry> key, DeleteItemOperationConfig config )
 Parameters
 Parameters- key (IDictionary<(Of <(<'String, DynamoDBEntry>)>)>)
- Key of the document.
- config (DeleteItemOperationConfig)
- Configuration to use.
 Return Value
 Return ValueNull or old attributes, depending on config.