public java.util.List<String> getTagValues() {
        if (tagValues == null) {
            tagValues = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return tagValues;
    }
<p>
A tag value or values for which you want to return all matching cluster parameter groups that are associated with
the specified tag value or values. For example, suppose that you have parameter groups that are tagged with
values called <code>admin</code> and <code>test</code>. If you specify both of these tag values in the request,
Amazon Redshift returns a response with the parameter groups that have either or both of these tag values
associated with them.
</p>

@return A tag value or values for which you want to return all matching cluster parameter groups that are
        associated with the specified tag value or values. For example, suppose that you have parameter groups
        that are tagged with values called <code>admin</code> and <code>test</code>. If you specify both of these
        tag values in the request, Amazon Redshift returns a response with the parameter groups that have either
        or both of these tag values associated with them.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/DescribeClusterParameterGroupsRequest.java