anchor.diff:      </pillar...MoveSelector>
   ----
   
  -In this case, the entity being operated on need not be `Comparable`. The given `subPillarSequenceComparatorClass` will be used to establish the sequence instead. Also, the size of the sub pillars will be limited in length of up to 1000 entities.
  +In this case, the entity being operated on need not be `Comparable`. The given `subPillarSequenceComparatorClass` is used to establish the sequence instead. Also, the size of the sub pillars is limited in length of up to 1000 entities.
   
   [[chainMoveSelectors]]
   === Move selectors for chained variables
  
positive.code:     <pillar...MoveSelector>
        ...
        <subPillarType>SEQUENCE</subPillarType>
        <subPillarSequenceComparatorClass>...</subPillarSequenceComparatorClass>
        <pillarSelector>
          ...
          <minimumSubPillarSize>1</minimumSubPillarSize>
  
negative.code:         </entitySelector>
          ...
        </secondaryPillarSelector>
        <variableNameInclude>employee</variableNameInclude>
        <variableNameInclude>...</variableNameInclude>
      </pillarSwapMoveSelector>
  ----
  
  For a description of `subPillarType` and related properties, please refer to <<subPillars,sub pillars>>.
  
  The `secondaryPillarSelector` is rarely needed: if it is not specified, entities from the same `pillarSelector` are swapped.
  
  