src/vs/workbench/services/userDataProfile/common/userDataProfileStorageRegistry.ts/ProfileStorageRegistryImpl/registerKeys
class ProfileStorageRegistryImpl:	registerKeys(keys: IProfileStorageKey[]): void {
		for (const key of keys) {
			this.storageKeys.set(key.key, key);
		}
		this._onDidRegister.fire(keys);
	}