---
title: 'PackageSpecificationInfo'
---

Information about transitive package specifications used in package groups.

## Members

* [contains](#contains)

## contains

```
bool PackageSpecificationInfo.contains(target)
```

Checks if a target exists in a package group.

### Parameters

| Parameter | Description |
| --- | --- |
| `target` | [Label](/versions/8.6.0/rules/lib/builtins/Label); or [string](/versions/8.6.0/rules/lib/core/string); required  A target which is checked if it exists inside the package group. |