anchor.diff:          ;
   ABSTRACTS
       : 'abstracts'
  -    ;
  -
  -ALIAS
  -    : 'alias'
       ;
   
   ASSIGN
  
positive.code: specifier
      : '=' expression
      -> ^(INIT_EXPR expression)
      ;
  
  nonstringLiteral
  
negative.code:         extendedType?
          satisfiedTypes?
          typeConstraints?
          (classBody | typeSpecifier | ';')
      ;
  
  objectDeclaration
  