Events classes used by Constellation.

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	Class	Description
	ConstellationEvent	An event associated with the Constellation component.
	EdgeRendererChangeEvent	An event dispatched after an edge renderer's property changes.
	EdgeRendererEvent	An event associated with a single edge renderer instance.
	NodeRendererChangeEvent	An event dispatched after a node renderer's property changes.
	NodeRendererEvent	An event associated with a single node renderer instance.