code: public GetCrawlerMetricsRequest withCrawlerNameList(String... crawlerNameList) {
          if (this.crawlerNameList == null) {
              setCrawlerNameList(new java.util.ArrayList<String>(crawlerNameList.length));
          }
          for (String ele : crawlerNameList) {
              this.crawlerNameList.add(ele);
          }
          return this;
      }
docs: <p>
  A list of the names of crawlers about which to retrieve metrics.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setCrawlerNameList(java.util.Collection)} or {@link #withCrawlerNameList(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param crawlerNameList
  A list of the names of crawlers about which to retrieve metrics.
  @return Returns a reference to this object so that method calls can be chained together.