public void setParameterGroups(java.util.Collection<ClusterParameterGroup> parameterGroups) {
        if (parameterGroups == null) {
            this.parameterGroups = null;
            return;
        }

        this.parameterGroups = new com.amazonaws.internal.SdkInternalList<ClusterParameterGroup>(parameterGroups);
    }
<p>
A list of <a>ClusterParameterGroup</a> instances. Each instance describes one cluster parameter group.
</p>

@param parameterGroups
       A list of <a>ClusterParameterGroup</a> instances. Each instance describes one cluster parameter group.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/DescribeClusterParameterGroupsResult.java