code: public void setMetrics(java.util.Collection<String> metrics) {
          if (metrics == null) {
              this.metrics = null;
              return;
          }
  
          this.metrics = new java.util.ArrayList<String>(metrics);
      }
docs: <p>
  The measurement that you want your reservation coverage reported in.
  </p>
  <p>
  Valid values are <code>Hour</code>, <code>Unit</code>, and <code>Cost</code>. You can use multiple values in a
  request.
  </p>
  
  @param metrics
  The measurement that you want your reservation coverage reported in.</p>
  <p>
  Valid values are <code>Hour</code>, <code>Unit</code>, and <code>Cost</code>. You can use multiple values
  in a request.