code: public ListContainerInstancesResult withContainerInstanceArns(String... containerInstanceArns) {
          if (this.containerInstanceArns == null) {
              setContainerInstanceArns(new com.amazonaws.internal.SdkInternalList<String>(containerInstanceArns.length));
          }
          for (String ele : containerInstanceArns) {
              this.containerInstanceArns.add(ele);
          }
          return this;
      }
docs: <p>
  The list of container instances with full ARN entries for each container instance associated with the specified
  cluster.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setContainerInstanceArns(java.util.Collection)} or
  {@link #withContainerInstanceArns(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param containerInstanceArns
  The list of container instances with full ARN entries for each container instance associated with the
  specified cluster.
  @return Returns a reference to this object so that method calls can be chained together.