src/vs/workbench/contrib/notebook/browser/view/cellParts/cellContextKeys.ts/CellContextKeyManager/updateForFocusState
class CellContextKeyManager:	private updateForFocusState() {
		if (!this.element) {
			return;
		}

		const activeCell = this.notebookEditor.getActiveCell();
		this.cellFocused.set(this.notebookEditor.getActiveCell() === this.element);

		if (activeCell === this.element) {
			this.cellEditorFocused.set(this.element.focusMode === CellFocusMode.Editor);
		} else {
			this.cellEditorFocused.set(false);
		}

	}