code: public com.google.api.ads.adwords.axis.v201809.cm.BiddingStrategySource getBiddingStrategySource() {
          return biddingStrategySource;
      }
docs: Gets the biddingStrategySource value for this BiddingStrategyConfiguration.
  
  @return biddingStrategySource   * Indicates where the bidding strategy is associated i.e. campaign,
  ad group or
  ad group criterion.
  <span class="constraint ReadOnly">This field is read
  only and will be ignored when sent to the API.</span>