code: public com.google.api.ads.admanager.axis.v201808.FirstPartyAudienceSegmentRule getRule() {
          return rule;
      }
docs: Gets the rule value for this RuleBasedFirstPartyAudienceSegment.
  
  @return rule   * Specifies the rule of the segment which determines user's eligibility
  criteria to be part of
  the segment. This attribute is required.