code: public void setGeoTargetingRestriction(com.google.api.ads.adwords.axis.v201809.cm.FeedItemGeoRestriction geoTargetingRestriction) {
          this.geoTargetingRestriction = geoTargetingRestriction;
      }
docs: Sets the geoTargetingRestriction value for this FeedItem.
  
  @param geoTargetingRestriction   * Geo targeting restriction specifies the type of location that
  can be used for targeting.
  Only applies if the feed item has a location FeedItemTarget.
  On update, if the field is left unspecified, the previous geo targeting
  restriction state
  will not be changed.
  On update, if the field is set with a null GeoRestriction
  enum, the geo targeting restriction
  will be cleared.