anchor.diff:                                
   
   relationshipReference
  -returns [List<String> ref]
  +returns [String[\] ref]
   //returns [RelationshipDeclaration.Reference ref]
                                 : optionalDomainReference
                                   relationshipName            
                                                               { 
  -                                                                ArrayList<String> r = new ArrayList<String>();
  -                                                                r.add( 0, $optionalDomainReference.ref );
  -                                                                r.add( 1, $relationshipName.name );
  +                                                                String[] r = new String[2];
  +                                                                r[0] = $optionalDomainReference.ref;
  +                                                                r[1] =$relationshipName.name;
                                                                   $ref = r;
                                                               }
                                 ;
  
positive.code:                               : ^( RELATIONSHIP_SPEC
                                     relationshipReference    
                                                              {
                                                                  s[0] = $relationshipReference.ref.get(0);
                                                                  s[1] = $relationshipReference.ref.get(1);
                                                              }
                                     ( objOrRole
                                                              {
  
negative.code: 
  @header
  {
  import java.io.*;
  }
  
  