public com.google.api.ads.adwords.axis.v201809.cm.BidSource getCpmBidSource() {
        return cpmBidSource;
    }
public com . google . api . ads . adwords . axis . v201809 . cm . BidSource getCpmBidSource ( ) { return cpmBidSource ; }
Gets the cpmBidSource value for this CpmBid.

@return cpmBidSource   * The level (ad group or criterion) at which the bid was set.
This is applicable
only at the criteria level.
<span class="constraint ReadOnly">This field is
read only and will be ignored when sent to the API.</span>