code: public com.google.api.ads.adwords.axis.v201809.cm.BiddingScheme getBiddingScheme() {
          return biddingScheme;
      }
docs: Gets the biddingScheme value for this BiddingStrategyConfiguration.
  
  @return biddingScheme   * The bidding strategy metadata. Bidding strategy can be associated
  using the {@linkplain
  BiddingStrategyConfiguration#biddingStrategyType}
  or the bidding scheme.
  
  <p>For details on portfolio vs. standard availability,
  see the <a
  href="https://developers.google.com/adwords/api/docs/guides/bidding">bidding
  guide</a>.
  
  <p>Starting with v201705, this field cannot be set
  at the ad group or ad group criterion level.