code: public DescribeImagesRequest withArns(String... arns) {
          if (this.arns == null) {
              setArns(new java.util.ArrayList<String>(arns.length));
          }
          for (String ele : arns) {
              this.arns.add(ele);
          }
          return this;
      }
docs: <p>
  The ARNs of the public, private, and shared images to describe.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setArns(java.util.Collection)} or {@link #withArns(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param arns
  The ARNs of the public, private, and shared images to describe.
  @return Returns a reference to this object so that method calls can be chained together.