public java.util.List<String> getVpcSecurityGroupIds() {
        return vpcSecurityGroupIds;
    }
<p>
A list of EC2 VPC security groups to authorize on this DB instance. This change is asynchronously applied as soon
as possible.
</p>
<p>
Not applicable. The associated list of EC2 VPC security groups is managed by the DB cluster. For more
information, see <a>ModifyDBCluster</a>.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
If supplied, must match existing VpcSecurityGroupIds.
</p>
</li>
</ul>

@return A list of EC2 VPC security groups to authorize on this DB instance. This change is asynchronously applied
        as soon as possible.</p>
        <p>
        Not applicable. The associated list of EC2 VPC security groups is managed by the DB cluster. For more
        information, see <a>ModifyDBCluster</a>.
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        If supplied, must match existing VpcSecurityGroupIds.
        </p>
        </li>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java