anchor.diff:      :
       annotations?
       ( 
  -        specifyDeclaration
  -      | memberDeclaration 
  +        memberDeclaration 
         -> ^(MEMBER_DECL memberDeclaration annotations?)
         | typeDeclaration 
         -> ^(TYPE_DECL typeDeclaration annotations?)
  
positive.code: specifier
      : '=' expression
      -> ^(INIT_EXPR expression)
      ;
  
  nonstringLiteral
  
negative.code:     | unionDeclaration
      ;
  
  importDeclaration
      : 'import' 'extension'? importPath ('.' wildcard | alias)? ';'
      -> ^(IMPORT_DECL importPath wildcard? alias?)
  