CrossFadeNode
Creates a GskRenderNode that will do a cross-fade between @start and @end.
Return
A new GskRenderNode
Parameters
start
The start node to be drawn
end
The node to be cross_fadeed onto the @start node
progress
How far the fade has progressed from start to end. The value will be clamped to the range 0 ... 1
constructor(pointer: <Error class: unknown class><<Error class: unknown class>>)