public void setMarker(String marker) {
        this.marker = marker;
    }
<p>
An optional parameter that specifies the starting point to return a set of response records. When the results of
a <a>DescribeClusterParameterGroups</a> request exceed the value specified in <code>MaxRecords</code>, Amazon Web
Services 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 marker value in the <code>Marker</code> parameter and retrying the
request.
</p>

@param marker
       An optional parameter that specifies the starting point to return a set of response records. When the
       results of a <a>DescribeClusterParameterGroups</a> request exceed the value specified in
       <code>MaxRecords</code>, Amazon Web Services 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 marker value in the
       <code>Marker</code> parameter and retrying the request.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/DescribeClusterParameterGroupsRequest.java