Call: Input
  Call: MatchedBraces
    Consumed token: <"{" at line 1 column 1>
    Call: MatchedBraces
      Consumed token: <"{" at line 1 column 2>
      Consumed token: <"}" at line 1 column 5>
    Return: MatchedBraces
    Consumed token: <"}" at line 2 column 1>
  Return: MatchedBraces
  Consumed token: <<EOF> at line 2 column 3>
Return: Input
matched
