src/vs/platform/extensionManagement/common/extensionEnablementService.ts/StorageManager/set
class StorageManager:	set(key: string, value: IExtensionIdentifier[], scope: StorageScope): void {
		let newValue: string = JSON.stringify(value.map(({ id, uuid }) => (<IExtensionIdentifier>{ id, uuid })));
		const oldValue = this._get(key, scope);
		if (oldValue !== newValue) {
			if (scope === StorageScope.GLOBAL) {
				if (value.length) {
					this.storage[key] = newValue;
				} else {
					delete this.storage[key];
				}
			}
			this._set(key, value.length ? newValue : undefined, scope);
		}
	}