public String getNamespace() {
        return this.namespace;
    }
<p>
The namespace of the package that contains the requested package versions. The package component that specifies
its namespace depends on its type. For example:
</p>
<ul>
<li>
<p>
The namespace of a Maven package version is its <code>groupId</code>.
</p>
</li>
<li>
<p>
The namespace of an npm or Swift package version is its <code>scope</code>.
</p>
</li>
<li>
<p>
The namespace of a generic package is its <code>namespace</code>.
</p>
</li>
<li>
<p>
Python, NuGet, Ruby, and Cargo package versions do not contain a corresponding component, package versions of
those formats do not have a namespace.
</p>
</li>
</ul>

@return The namespace of the package that contains the requested package versions. The package component that
        specifies its namespace depends on its type. For example:</p>
        <ul>
        <li>
        <p>
        The namespace of a Maven package version is its <code>groupId</code>.
        </p>
        </li>
        <li>
        <p>
        The namespace of an npm or Swift package version is its <code>scope</code>.
        </p>
        </li>
        <li>
        <p>
        The namespace of a generic package is its <code>namespace</code>.
        </p>
        </li>
        <li>
        <p>
        Python, NuGet, Ruby, and Cargo package versions do not contain a corresponding component, package
        versions of those formats do not have a namespace.
        </p>
        </li>
aws-java-sdk-codeartifact/src/main/java/com/amazonaws/services/codeartifact/model/ListPackageVersionsResult.java