public Boolean isPreview() {
        return this.preview;
    }
<p>
When this flag is included, <code>ListAssociatedPackages</code> will return a list of packages that would be
associated with a package group, even if it does not exist.
</p>

@return When this flag is included, <code>ListAssociatedPackages</code> will return a list of packages that would
        be associated with a package group, even if it does not exist.
aws-java-sdk-codeartifact/src/main/java/com/amazonaws/services/codeartifact/model/ListAssociatedPackagesRequest.java