src/vs/workbench/services/extensions/common/extensionDescriptionRegistry.ts/ExtensionDescriptionRegistry/getExtensionDescription
class ExtensionDescriptionRegistry:	public getExtensionDescription(extensionId: ExtensionIdentifier | string): IExtensionDescription | undefined {
		const extension = this._extensionsMap.get(ExtensionIdentifier.toKey(extensionId));
		return extension ? extension : undefined;
	}