| Interface | Description | 
|---|---|
| Invoker | This is part of the SPI to allow additional functional style
 functionality to built using the primitives provided by this toolkit. | 
| Properties | |
| Properties.Graph | |
| Properties.Graph.Config | |
| SourceInfo | Add the ability to add source location information to an operator invocation. | 
| Class | Description | 
|---|---|
| Builder | |
| LayoutInfo | Layout hints for the Streams console. |