I am also looking for this feature desperately.
a. Once you select a bar in the timeline, is there a way to deselect it ? Currently it doesn't allow this. Other google charts like bar charts have this feature.
b. Select more than one bar. Currently when you pass an array of selectedItems(with {row: number, column: number} ), to setSelection(), it only gets into an infinite loop.
It will be very helpful if i could know this feature will be available in the near future or not.
Thanks in Advance,
Parvathi.K