code: public void setInventoryRule(com.google.api.ads.admanager.axis.v201808.InventoryTargeting inventoryRule) {
          this.inventoryRule = inventoryRule;
      }
docs: Sets the inventoryRule value for this FirstPartyAudienceSegmentRule.
  
  @param inventoryRule   * Specifies the inventory (i.e. ad units and placements) that
  are part of the rule of a
  {@link FirstPartyAudienceSegment}. This attribute
  is required.