tonihei f3d48c21f4 Define CueGroup.EMPTY_TIME_ZERO for convenience ... We create an empty CueGroup in many places as default or where none is needed. Instead, we can define a constant for this purpose and reuse it. PiperOrigin-RevId: 467944841 (cherry picked from commit 59895646e0)		2022-08-16 16:27:56 +00:00
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main	Define CueGroup.EMPTY_TIME_ZERO for convenience	2022-08-16 16:27:56 +00:00
test	Don't set the tag in CastTimeline	2022-07-12 20:41:57 +00:00