src/vs/workbench/api/common/extHostExtensionService.ts/Extension/constructor
class Extension:	constructor(extensionService: IExtHostExtensionService, originExtensionId: ExtensionIdentifier, description: IExtensionDescription, kind: ExtensionKind) {
		this.#extensionService = extensionService;
		this.#originExtensionId = originExtensionId;
		this.#identifier = description.identifier;
		this.id = description.identifier.value;
		this.extensionUri = description.extensionLocation;
		this.extensionPath = path.normalize(originalFSPath(description.extensionLocation));
		this.packageJSON = description;
		this.extensionKind = kind;
	}