anchor.diff:      |    FUNCTION // Built-in identifier that can be used as a type.
       ;
   
  -qualified
  +qualifiedName
       :    typeIdentifier
       |    typeIdentifier '.' identifier
       |    typeIdentifier '.' typeIdentifier '.' identifier
  
positive.code:     ;
  
  ifStatement
      :    IF '(' expression ')' statement (ELSE statement | ())
      ;
  
  forStatement
  
negative.code:     ;
  
  initializers
      :    ':' initializerListEntry (',' initializerListEntry)*
      ;
  
  initializerListEntry
      :    SUPER arguments
      |    SUPER '.' identifier arguments
      |    fieldInitializer
      |    assertion
      ;
  
  fieldInitializer
      :    (THIS '.')? identifier '=' initializerExpression
      ;
  
  initializerExpression
      :    conditionalExpression
      |    cascade
      ;
  
  factoryConstructorSignature
  