src/vs/platform/extensions/electron-main/extensionHostStarter.ts/ExtensionHostStarter/kill
class ExtensionHostStarter:	async kill(id: string): Promise<void> {
		if (this._shutdown) {
			throw canceled();
		}
		const extHostProcess = this._extHosts.get(id);
		if (!extHostProcess) {
			// already gone!
			return;
		}
		extHostProcess.kill();
	}