public void setDBSecurityGroups(java.util.Collection<String> dBSecurityGroups) {
        if (dBSecurityGroups == null) {
            this.dBSecurityGroups = null;
            return;
        }

        this.dBSecurityGroups = new java.util.ArrayList<String>(dBSecurityGroups);
    }
<p>
A list of DB security groups to authorize on this DB instance. Changing this setting doesn't result in an outage
and the change is asynchronously applied as soon as possible.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
If supplied, must match existing DBSecurityGroups.
</p>
</li>
</ul>

@param dBSecurityGroups
       A list of DB security groups to authorize on this DB instance. Changing this setting doesn't result in an
       outage and the change is asynchronously applied as soon as possible.</p>
       <p>
       Constraints:
       </p>
       <ul>
       <li>
       <p>
       If supplied, must match existing DBSecurityGroups.
       </p>
       </li>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java