build method
Implementation
String build() => [
if (property != null) property!.name,
duration.secondsText,
if (delay != null) delay!.secondsText,
if (timingFunction != null) timingFunction!.build(),
].join(' ');
String build() => [
if (property != null) property!.name,
duration.secondsText,
if (delay != null) delay!.secondsText,
if (timingFunction != null) timingFunction!.build(),
].join(' ');