code: public DescribeClassicLinkInstancesResult withInstances(ClassicLinkInstance... instances) {
          if (this.instances == null) {
              setInstances(new com.amazonaws.internal.SdkInternalList<ClassicLinkInstance>(instances.length));
          }
          for (ClassicLinkInstance ele : instances) {
              this.instances.add(ele);
          }
          return this;
      }
docs: <p>
  Information about one or more linked EC2-Classic instances.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setInstances(java.util.Collection)} or {@link #withInstances(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param instances
  Information about one or more linked EC2-Classic instances.
  @return Returns a reference to this object so that method calls can be chained together.