src/vs/editor/contrib/hover/browser/hoverOperation.ts/HoverOperation/_triggerSyncComputation
class HoverOperation:	private _triggerSyncComputation(): void {
		if (this._computer.computeSync) {
			this._result = this._result.concat(this._computer.computeSync());
		}
		this._setState(this._asyncIterableDone ? HoverOperationState.Idle : HoverOperationState.WaitingForAsync);
	}