code: public java.util.List<GroupIdentifier> getAllSecurityGroups() {
          if (allSecurityGroups == null) {
              allSecurityGroups = new com.amazonaws.internal.SdkInternalList<GroupIdentifier>();
          }
          return allSecurityGroups;
      }
docs: <p>
  One or more security groups. When requesting instances in a VPC, you must specify the IDs of the security groups.
  When requesting instances in EC2-Classic, you can specify the names or the IDs of the security groups.
  </p>
  
  @return One or more security groups. When requesting instances in a VPC, you must specify the IDs of the security
  groups. When requesting instances in EC2-Classic, you can specify the names or the IDs of the security
  groups.