src/vs/base/browser/ui/scrollbar/scrollbarVisibilityController.ts/ScrollbarVisibilityController/applyVisibilitySetting
class ScrollbarVisibilityController:	private applyVisibilitySetting(shouldBeVisible: boolean): boolean {
		if (this._visibility === ScrollbarVisibility.Hidden) {
			return false;
		}
		if (this._visibility === ScrollbarVisibility.Visible) {
			return true;
		}
		return shouldBeVisible;
	}