FitNesse.
UserGuide.
DotNet.
SuiteAcceptanceTests.
SuiteCellHandlerTests.
SuiteOptionalAndCustomHandlerTests [add child]
SuiteOptionalAndCustomHandlerTests [add child]
There are several optional handlers that you can load explicitly (using the CellHandlerLoader). You can also create and load your own custom handlers.
Add Child Page to SuiteOptionalAndCustomHandlerTests