src/vs/workbench/api/common/extHostTerminalService.ts/BaseExtHostTerminalService/_syncEnvironmentVariableCollection
class BaseExtHostTerminalService:	private _syncEnvironmentVariableCollection(extensionIdentifier: string, collection: EnvironmentVariableCollection): void {
		const serialized = serializeEnvironmentVariableCollection(collection.map);
		this._proxy.$setEnvironmentVariableCollection(extensionIdentifier, collection.persistent, serialized.length === 0 ? undefined : serialized);
	}