code: public com.google.api.ads.adwords.axis.v201809.cm.FeedItemAdGroupTargeting getAdGroupTargeting() {
          return adGroupTargeting;
      }
docs: Gets the adGroupTargeting value for this ExtensionFeedItem.
  
  @return adGroupTargeting   * Adgroup targeting specifying what adgroup this extension can
  serve with.
  On update, if the field is left unspecified, the previous
  adgroup targeting state
  will not be changed.
  On update, if the field is set with an empty FeedItemAdGroupTargeting,
  the
  adgroup targeting will be cleared.
  Note: If adGroupTargeting and campaignTargeting are
  set (either in the request or pre-existing
  from a previous request), the targeted campaign must
  match the targeted adgroup's campaign.
  If only adGroupTargeting is specified and there is
  no campaignTargeting, then a
  campaignTargeting will be set to the targeted adgroup's
  campaign.