This documentation is intended to provide developers with a guide to developing rendering objects.

= Tips and Techniques =

*  Your implementation of `RenderObject::layout()` should guarantee that object and its descendants do not need '''any''' layout when you leave the method.
*  In your `RenderObject::layout()` method, add a `ASSERT(needsLayout())` at the beginning and a `setNeedsLayout(false)` at the end.