code: public com.google.api.ads.admanager.axis.v201902.CustomCriteriaSet getCustomCriteriaRule() {
          return customCriteriaRule;
      }
docs: Gets the customCriteriaRule value for this FirstPartyAudienceSegmentRule.
  
  @return customCriteriaRule   * Specifies the collection of custom criteria that are part of
  the rule of a
  {@link FirstPartyAudienceSegment}.
  
  <p>
  Once the {@link FirstPartyAudienceSegment} is updated
  or modified with custom criteria, the
  server may return a normalized, but equivalent representation
  of the custom criteria rule.
  </p>
  
  <ul>
  {@code customCriteriaRule} will have up to three levels
  including itself.
  <li>
  The top level {@link CustomCriteriaSet} i.e. the {@code
  customTargeting} object can only
  contain a {@link CustomCriteriaSet.LogicalOperator#OR}
  of all its children.
  <li>
  The second level of {@link CustomCriteriaSet} objects
  can only contain
  {@link CustomCriteriaSet.LogicalOperator#AND} of all
  their children. If a
  {@link CustomCriteria} is placed on this level, the
  server will wrap it in a
  {@link CustomCriteriaSet}.
  <li>
  The third level can only comprise of {@link CustomCriteria}
  objects.
  </ul>
  
  <p>
  The resulting custom criteria rule would be of the
  form: <br>
  <img
  src="https://chart.apis.google.com/chart?cht=gv&chl=digraph{customTargeting_LogicalOperator_OR-%3ECustomCriteriaSet_LogicalOperator_AND_1-%3ECustomCriteria_1;CustomCriteriaSet_LogicalOperator_AND_1-%3Eellipsis1;customTargeting_LogicalOperator_OR-%3Eellipsis2;ellipsis1[label=%22...%22,shape=none,fontsize=32];ellipsis2[label=%22...%22,shape=none,fontsize=32]}&chs=450x200"/>
  </p>