Use focus service in attention viz.
Use focus service in attention viz.

Focus a token upon hover on its label.
If a token is focused, only show attention lines to/from that token.

PiperOrigin-RevId: 363207452

PAIR-code/lit,PAIR-code/lit,PAIR-code/lit,pair-code/lit,pair-code/lit,PAIR-code/lit,pair-code/lit,pair-code/lit,pair-code/lit,PAIR-code/lit