anchor.diff:      ;
   
   constructorDesignation
  -    :    qualified
  +    :    qualifiedName
       |    typeName typeArguments ('.' identifier)?
       ;
   
  
positive.code:     ;
  
  ifStatement
      :    IF '(' expression ')' statement (ELSE statement | ())
      ;
  
  forStatement
  
negative.code: 
  // NB: It is an anomaly that VAR can be a return type (`var this.x()`).
  fieldFormalParameter
      :    finalConstVarOrType? THIS '.' identifier (formalParameterPart '?'?)?
      ;
  
  defaultFormalParameter
  