public java.util.List<String> getSecurityGroupIds() {
        return securityGroupIds;
    }
<p>
A list of security groups IDs that are available to attach to your server's endpoint.
</p>
<note>
<p>
This property can only be set when <code>EndpointType</code> is set to <code>VPC</code>.
</p>
<p>
You can edit the <code>SecurityGroupIds</code> property in the <a
href="https://docs.aws.amazon.com/transfer/latest/userguide/API_UpdateServer.html">UpdateServer</a> API only if
you are changing the <code>EndpointType</code> from <code>PUBLIC</code> or <code>VPC_ENDPOINT</code> to
<code>VPC</code>. To change security groups associated with your server's VPC endpoint after creation, use the
Amazon EC2 <a
href="https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_ModifyVpcEndpoint.html">ModifyVpcEndpoint</a>
API.
</p>
</note>

@return A list of security groups IDs that are available to attach to your server's endpoint.</p> <note>
        <p>
        This property can only be set when <code>EndpointType</code> is set to <code>VPC</code>.
        </p>
        <p>
        You can edit the <code>SecurityGroupIds</code> property in the <a
        href="https://docs.aws.amazon.com/transfer/latest/userguide/API_UpdateServer.html">UpdateServer</a> API
        only if you are changing the <code>EndpointType</code> from <code>PUBLIC</code> or
        <code>VPC_ENDPOINT</code> to <code>VPC</code>. To change security groups associated with your server's
        VPC endpoint after creation, use the Amazon EC2 <a
        href="https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_ModifyVpcEndpoint.html"
        >ModifyVpcEndpoint</a> API.
        </p>
aws-java-sdk-transfer/src/main/java/com/amazonaws/services/transfer/model/EndpointDetails.java