public void setTagKeys(java.util.Collection<String> tagKeys) {
        if (tagKeys == null) {
            this.tagKeys = null;
            return;
        }

        this.tagKeys = new com.amazonaws.internal.SdkInternalList<String>(tagKeys);
    }
<p>
A tag key or keys for which you want to return all matching cluster parameter groups that are associated with the
specified key or keys. For example, suppose that you have parameter groups that are tagged with keys called
<code>owner</code> and <code>environment</code>. If you specify both of these tag keys in the request, Amazon
Redshift returns a response with the parameter groups that have either or both of these tag keys associated with
them.
</p>

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