src/vs/workbench/services/views/browser/viewDescriptorService.ts/ViewDescriptorService/getOrCreateMovableViewContextKey
class ViewDescriptorService:	private getOrCreateMovableViewContextKey(viewDescriptor: IViewDescriptor): IContextKey<boolean> {
		const movableViewContextKeyId = `${viewDescriptor.id}.canMove`;
		let contextKey = this.movableViewContextKeys.get(movableViewContextKeyId);
		if (!contextKey) {
			contextKey = new RawContextKey(movableViewContextKeyId, false).bindTo(this.contextKeyService);
			this.movableViewContextKeys.set(movableViewContextKeyId, contextKey);
		}
		return contextKey;
	}