This is a special TextNode that automatically updates itself with output from a SceneGraphAnalyzer instance.
It can be placed anywhere in the world where you'd like to see the output from SceneGraphAnalyzer.
It also has a special mode in which it may be attached directly to a channel or window. If this is done, it creates a DisplayRegion for itself and renders itself in the upper-right-hand corner.
Definition at line 43 of file sceneGraphAnalyzerMeter.h.