anchor.diff:                                     domainReference
                                      terminatorName
                                      serviceName
  -                                   parameterList
  +                                   parameterList[null]
                                      returnType?
                                      codeBlock
                                      pragmaList
  
positive.code:                                        t.append( _SPACE );
                                         t.append( getText( $serviceName.text ) );
                                         t.append( _SPACE );
                                         t.append( getText( $parameterList.text ) );
                                     }
                                     (returnType
  
negative.code:                                    INSTANCE?
                                     fullObjectReference
                                     serviceName
                                     parameterList[null]
                                     returnType?
                                     codeBlock
                                     pragmaList
  