src/vs/workbench/services/extensionManagement/common/extensionManagementService.ts/ExtensionManagementService/getManifest
class ExtensionManagementService:	getManifest(vsix: URI): Promise<IExtensionManifest> {
		if (vsix.scheme === Schemas.file && this.extensionManagementServerService.localExtensionManagementServer) {
			return this.extensionManagementServerService.localExtensionManagementServer.extensionManagementService.getManifest(vsix);
		}
		if (vsix.scheme === Schemas.vscodeRemote && this.extensionManagementServerService.remoteExtensionManagementServer) {
			return this.extensionManagementServerService.remoteExtensionManagementServer.extensionManagementService.getManifest(vsix);
		}
		return Promise.reject('No Servers');
	}