public java.util.List<DBSubnetGroup> getDBSubnetGroups() {
        if (dBSubnetGroups == null) {
            dBSubnetGroups = new com.amazonaws.internal.SdkInternalList<DBSubnetGroup>();
        }
        return dBSubnetGroups;
    }
<p>
A list of <code>DBSubnetGroup</code> instances.
</p>

@return A list of <code>DBSubnetGroup</code> instances.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DescribeDBSubnetGroupsResult.java