turn property
How far a LayerAnimationType.spin or LayerAnimationType.flip has the
layer turned, in full turns, clockwise for a positive value: from
-LayerAnimation.turns to 0 over an in-animation, so it turns into
place the same way it turns away over an out-animation, from 0 to
LayerAnimation.turns. A loop counts on by LayerAnimation.turns every
cycle; whole turns are taken off, as they look the same. 0 for any
other type.
Implementation
final double turn;