advance method
Implementation
bool advance(double elapsedSeconds) {
if (mountedArtboard == null || isCollapsed) {
return false;
}
bool keepGoing = false;
for (final animation in _animations) {
if (animation.isEnabled) {
if (animation.advance(elapsedSeconds, mountedArtboard!)) {
keepGoing = true;
}
}
}
if (mountedArtboard!.advance(elapsedSeconds)) {
keepGoing = true;
}
return keepGoing;
}