code: public ListModelPackagesResult withModelPackageSummaryList(ModelPackageSummary... modelPackageSummaryList) {
          if (this.modelPackageSummaryList == null) {
              setModelPackageSummaryList(new java.util.ArrayList<ModelPackageSummary>(modelPackageSummaryList.length));
          }
          for (ModelPackageSummary ele : modelPackageSummaryList) {
              this.modelPackageSummaryList.add(ele);
          }
          return this;
      }
docs: <p>
  An array of <code>ModelPackageSummary</code> objects, each of which lists a model package.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setModelPackageSummaryList(java.util.Collection)} or
  {@link #withModelPackageSummaryList(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param modelPackageSummaryList
  An array of <code>ModelPackageSummary</code> objects, each of which lists a model package.
  @return Returns a reference to this object so that method calls can be chained together.