public String getGroupName() {
        return this.groupName;
    }
<p>
[Default VPC] The name of the security group. For a security group in a nondefault VPC, use the security group
ID.
</p>
<p>
For a referenced security group in another VPC, this value is not returned if the referenced security group is
deleted.
</p>

@return [Default VPC] The name of the security group. For a security group in a nondefault VPC, use the security
        group ID. </p>
        <p>
        For a referenced security group in another VPC, this value is not returned if the referenced security
        group is deleted.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/UserIdGroupPair.java