anchor.diff:                                                                    if ( $INSTANCE != null )
                                                                         args[4] = $INSTANCE.text;
                                                                     if ( $relationshipReference.ref != null )
  -                                                                      args[5] = $relationshipReference.ref.get(1);
  +                                                                      args[5] = $relationshipReference.ref[1];
                                                                     populate( "operation", args );
                                                               }
                                      parameterList
  
positive.code:                               
  
  relationshipReference
  returns [List<String> ref]
  //returns [RelationshipDeclaration.Reference ref]
                                : optionalDomainReference
                                  relationshipName            
                                                              { 
                                                                  ArrayList<String> r = new ArrayList<String>();
                                                                  r.add( 0, $optionalDomainReference.ref );
                                                                  r.add( 1, $relationshipName.name );
                                                                  $ref = r;
                                                              }
                                ;
  
negative.code: 
  @header
  {
  import java.io.*;
  }
  
  