lastFrameTimeNanos

Last frame time of the animation.

If the animation has never started, this will be AnimationConstants.UnspecifiedTime, unless specified otherwise in the AnimationState constructor. lastFrameTimeNanos is the frame time when the animation is last updated, in the System.nanoTime timebase. It is also used for starting a sequential animation in com.jakewharton.mosaic.animation.animateTo. This allows the sequential animation to set its start time to when the previous animation is interrupted or finished.