public String getDBClusterIdentifier() {
        return this.dBClusterIdentifier;
    }
<p>
The user-provided cluster identifier. If this parameter is specified, information from only the specific cluster
is returned. This parameter isn't case sensitive.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
If provided, must match an existing <code>DBClusterIdentifier</code>.
</p>
</li>
</ul>

@return The user-provided cluster identifier. If this parameter is specified, information from only the specific
        cluster is returned. This parameter isn't case sensitive.</p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        If provided, must match an existing <code>DBClusterIdentifier</code>.
        </p>
        </li>
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/DescribeDBClustersRequest.java