code: public void setAdExchangeEnvironment(com.google.api.ads.admanager.axis.v201902.AdExchangeEnvironment adExchangeEnvironment) {
          this.adExchangeEnvironment = adExchangeEnvironment;
      }
docs: Sets the adExchangeEnvironment value for this BuyerRfp.
  
  @param adExchangeEnvironment   * Identifies the format of the inventory or "channel" through
  which the ad serves. Environments
  currently supported include {@link AdExchangeEnvironment#DISPLAY},
  {@link AdExchangeEnvironment#VIDEO}, and {@link AdExchangeEnvironment#MOBILE}.
  <span class="constraint ReadOnly">This attribute is read-only when:<ul><li>using
  programmatic guaranteed, not using sales management.</li><li>using
  preferred deals, not using sales management.</li></ul></span>