BooleanKeyframeTrack constructor
name - identifier for the KeyframeTrack.
times - array of keyframe times.
values - values for the keyframes at the times specified.
Implementation
BooleanKeyframeTrack(super.name, super.times, super.values, [super.interpolation]){
valueBufferType = "Array";
defaultInterpolation = InterpolateDiscrete;
valueTypeName = 'bool';
}