public void setMarker(String marker) {
        this.marker = 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>

@param marker
       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