docs: 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;
      }