code: public java.util.List<String> getClassicLinkVPCSecurityGroups() {
          if (classicLinkVPCSecurityGroups == null) {
              classicLinkVPCSecurityGroups = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return classicLinkVPCSecurityGroups;
      }
docs: <p>
  The IDs of one or more security groups for the VPC specified in <code>ClassicLinkVPCId</code>. For more
  information, see <a
  href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-classiclink.html">ClassicLink</a> in the <i>Amazon
  EC2 User Guide for Linux Instances</i> and <a
  href="https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-in-vpc.html#as-ClassicLink">Linking EC2-Classic
  Instances to a VPC</a> in the <i>Amazon EC2 Auto Scaling User Guide</i>.
  </p>
  <p>
  Conditional: This parameter is required if you specify a ClassicLink-enabled VPC, and cannot be used otherwise.
  </p>
  
  @return The IDs of one or more security groups for the VPC specified in <code>ClassicLinkVPCId</code>. For more
  information, see <a
  href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-classiclink.html">ClassicLink</a> in the
  <i>Amazon EC2 User Guide for Linux Instances</i> and <a
  href="https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-in-vpc.html#as-ClassicLink">Linking
  EC2-Classic Instances to a VPC</a> in the <i>Amazon EC2 Auto Scaling User Guide</i>.</p>
  <p>
  Conditional: This parameter is required if you specify a ClassicLink-enabled VPC, and cannot be used
  otherwise.