src/vs/workbench/api/common/extHostStorage.ts/ExtHostStorage/initializeExtensionStorage
class ExtHostStorage:	async initializeExtensionStorage(shared: boolean, key: string, defaultValue?: object): Promise<object | undefined> {
		const value = await this._proxy.$initializeExtensionStorage(shared, key);

		let parsedValue: object | undefined;
		if (value) {
			parsedValue = this.safeParseValue(shared, key, value);
		}

		return parsedValue || defaultValue;
	}