Puts a document into DynamoDB, using specified configs.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public Document PutItem( Document doc, PutItemOperationConfig config )
 Parameters
 Parameters- doc (Document)
- Document to save.
- config (PutItemOperationConfig)
- Configuration to use.
 Return Value
 Return ValueNull or updated attributes, depending on config.