docs: public ListElasticsearchInstanceTypesResult withElasticsearchInstanceTypes(String... elasticsearchInstanceTypes) {
          if (this.elasticsearchInstanceTypes == null) {
              setElasticsearchInstanceTypes(new java.util.ArrayList<String>(elasticsearchInstanceTypes.length));
          }
          for (String ele : elasticsearchInstanceTypes) {
              this.elasticsearchInstanceTypes.add(ele);
          }
          return this;
      }