call method
The GameFrame for a single replay frame index.
Memoized per (gameId, index): GameRules.parseObservation runs once per
frame no matter how often the user steps back and forth across it. Timing is
always empty, since a replay has no live clocks. Returns null until the frames
and the version unit have both loaded, or for an out-of-range index.
Implementation
ReplayFrameAtProvider call({required String gameId, required int index}) =>
ReplayFrameAtProvider._(
argument: (gameId: gameId, index: index),
from: this,
);