public DescribeDBSubnetGroupsResult withDBSubnetGroups(DBSubnetGroup... dBSubnetGroups) {
        if (this.dBSubnetGroups == null) {
            setDBSubnetGroups(new com.amazonaws.internal.SdkInternalList<DBSubnetGroup>(dBSubnetGroups.length));
        }
        for (DBSubnetGroup ele : dBSubnetGroups) {
            this.dBSubnetGroups.add(ele);
        }
        return this;
    }
<p>
A list of <code>DBSubnetGroup</code> instances.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setDBSubnetGroups(java.util.Collection)} or {@link #withDBSubnetGroups(java.util.Collection)} if you want
to override the existing values.
</p>

@param dBSubnetGroups
       A list of <code>DBSubnetGroup</code> instances.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DescribeDBSubnetGroupsResult.java