src/vs/workbench/api/common/extHostExtensionActivator.ts/ExtensionsActivator/getActivatedExtension
class ExtensionsActivator:	public getActivatedExtension(extensionId: ExtensionIdentifier): ActivatedExtension {
		const op = this._operations.get(ExtensionIdentifier.toKey(extensionId));
		if (!op || !op.value) {
			throw new Error(`Extension '${extensionId.value}' is not known or not activated`);
		}
		return op.value;
	}