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 resources that are associated with the specified key
or keys. For example, suppose that you have resources 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 all resources 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 resources that are associated with the
       specified key or keys. For example, suppose that you have resources 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 all resources that have either or both of these tag keys
       associated with them.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/DescribeSnapshotCopyGrantsRequest.java