code: public DescribeSpotPriceHistoryRequest withProductDescriptions(String... productDescriptions) {
          if (this.productDescriptions == null) {
              setProductDescriptions(new com.amazonaws.internal.SdkInternalList<String>(productDescriptions.length));
          }
          for (String ele : productDescriptions) {
              this.productDescriptions.add(ele);
          }
          return this;
      }
docs: <p>
  Filters the results by the specified basic product descriptions.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setProductDescriptions(java.util.Collection)} or {@link #withProductDescriptions(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param productDescriptions
  Filters the results by the specified basic product descriptions.
  @return Returns a reference to this object so that method calls can be chained together.