Gets a document from DynamoDB by key, using specified configs.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public Document GetItem( IDictionary<string, DynamoDBEntry> key, GetItemOperationConfig config )
 Parameters
 Parameters- key (IDictionary<(Of <(<'String, DynamoDBEntry>)>)>)
- Key of the document.
- config (GetItemOperationConfig)
- Configuration to use.
 Return Value
 Return ValueDocument from DynamoDB.