src/vs/workbench/services/extensionManagement/common/extensionManagementService.ts/ExtensionManagementService/canInstall
class ExtensionManagementService:	async canInstall(gallery: IGalleryExtension): Promise<boolean> {
		for (const server of this.servers) {
			if (await server.extensionManagementService.canInstall(gallery)) {
				return true;
			}
		}
		return false;
	}