code: public com.google.api.ads.adwords.axis.v201809.cm.BidSource getBidSource() {
          return bidSource;
      }
docs: Gets the bidSource value for this CpaBid.
  
  @return bidSource   * The level (ad group, ad group strategy, or campaign strategy)
  at which the bid was set.
  This is applicable only at the ad group level.
  <span class="constraint ReadOnly">This field is read only and will
  be ignored when sent to the API.</span>