Root @ 0..13
  SimpleMessage @ 0..13
    Pattern @ 0..13
      Text @ 0..7
        TOKEN TextToken @ 0..7 "Hello, "
      Placeholder @ 7..13
        VariableExpression @ 7..13
          TOKEN LeftBraceToken @ 7..8 "{"
          Variable @ 8..13
            TOKEN DollarToken @ 8..9 "$"
            Name @ 9..13
              TOKEN NameToken @ 9..13 "name"
          Missing @ 13..13
--diagnostics--
UnclosedExpression @ 7..13 (line 1, col 8): unclosed placeholder expression
