anchor.diff:      ;
   
   namedSpecifiedArgument
  -    : parameterName specifier semi
  +    : parameterName specifier ';'
       -> parameterName ^(SPECIFIED_ARGUMENT parameterName specifier)
       ;
   
  
positive.code:       typeName typeParameters? parameters extraParameters?
        caseTypes? metatypes? extendedType? satisfiedTypes?
        typeConstraints?
        (classBody | typeSpecifier? semi)
      ;
  
  classBody
  
negative.code:       typeName typeParameters?
        caseTypes? metatypes? satisfiedTypes?
        typeConstraints?
        (interfaceBody | typeSpecifier ';'!)
      ;
  
  interfaceBody
  