createTicker method
Creates a Ticker driven by this element's VSYNC provider.
Implementation
@override
Ticker createTicker(TickerCallback onTick) {
final bool muted = !TickerMode.valuesOf(this).enabled;
final ticker = _VsyncElementTicker(
onTick,
this,
debugLabel: kDebugMode ? 'created by $this' : null,
)..muted = muted;
(_tickers ??= <_VsyncElementTicker>{}).add(ticker);
return ticker;
}