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