anchor.diff:  
   build_dot_alias(Dot, Other, {'aliases', _, Right}) ->
     {'__aliases__', meta_from_token(Dot), [Other|Right]}.
  +
  +build_dot_container(Dot, Left, Right) ->
  +  Meta = meta_from_token(Dot),
  +  {{'.', Meta, [Left, '{}']}, Meta, Right}.
   
   build_dot(Dot, Left, Right) ->
     {'.', meta_from_token(Dot), [Left, extract_identifier(Right)]}.
  
positive.code: 
  dot_alias -> aliases : {'__aliases__', meta_from_token('$1', 0), ?exprs('$1')}.
  dot_alias -> matched_expr dot_op aliases : build_dot_alias('$2', '$1', '$3').
  
  dot_op_identifier -> op_identifier : '$1'.
  dot_op_identifier -> matched_expr dot_op op_identifier : build_dot('$2', '$1', '$3').
  
negative.code:   call_args_no_parens_many_strict
    stab stab_eoe stab_expr stab_maybe_expr stab_parens_many
    kw_eol kw_base kw call_args_no_parens_kw_expr call_args_no_parens_kw
    dot_op dot_alias dot_alias_container
    dot_identifier dot_op_identifier dot_do_identifier
    dot_paren_identifier dot_bracket_identifier
    do_block fn_eoe do_eoe end_eoe block_eoe block_item block_list
    .
  