code: public ListElasticsearchVersionsResult withElasticsearchVersions(String... elasticsearchVersions) {
          if (this.elasticsearchVersions == null) {
              setElasticsearchVersions(new java.util.ArrayList<String>(elasticsearchVersions.length));
          }
          for (String ele : elasticsearchVersions) {
              this.elasticsearchVersions.add(ele);
          }
          return this;
      }
docs: <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setElasticsearchVersions(java.util.Collection)} or
  {@link #withElasticsearchVersions(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param elasticsearchVersions
  @return Returns a reference to this object so that method calls can be chained together.