public String getMarker() {
        return this.marker;
    }
<p>
An optional parameter that specifies the starting point for returning a set of response records. When the results
of a <code>DescribeClusterDbRevisions</code> request exceed the value specified in <code>MaxRecords</code>,
Amazon Redshift returns a value in the <code>marker</code> field of the response. You can retrieve the next set
of response records by providing the returned <code>marker</code> value in the <code>marker</code> parameter and
retrying the request.
</p>
<p>
Constraints: You can specify either the <code>ClusterIdentifier</code> parameter, or the <code>marker</code>
parameter, but not both.
</p>

@return An optional parameter that specifies the starting point for returning a set of response records. When the
        results of a <code>DescribeClusterDbRevisions</code> request exceed the value specified in
        <code>MaxRecords</code>, Amazon Redshift returns a value in the <code>marker</code> field of the
        response. You can retrieve the next set of response records by providing the returned <code>marker</code>
        value in the <code>marker</code> parameter and retrying the request. </p>
        <p>
        Constraints: You can specify either the <code>ClusterIdentifier</code> parameter, or the
        <code>marker</code> parameter, but not both.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/DescribeClusterDbRevisionsRequest.java