SOURCE_FILE@0..33
  FN@0..32
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..6
      IDENT@3..6 "foo"
    PARAM_LIST@6..8
      L_PAREN@6..7 "("
      R_PAREN@7..8 ")"
    WHITESPACE@8..9 " "
    BLOCK_EXPR@9..32
      L_CURLY@9..10 "{"
      WHITESPACE@10..15 "\n    "
      LET_STMT@15..30
        LET_KW@15..18 "let"
        WHITESPACE@18..19 " "
        WILDCARD_PAT@19..20
          UNDERSCORE@19..20 "_"
        WHITESPACE@20..21 " "
        EQ@21..22 "="
        WHITESPACE@22..23 " "
        EFFECT_EXPR@23..29
          TRY_KW@23..26 "try"
          WHITESPACE@26..27 " "
          BLOCK_EXPR@27..29
            L_CURLY@27..28 "{"
            R_CURLY@28..29 "}"
        SEMICOLON@29..30 ";"
      WHITESPACE@30..31 "\n"
      R_CURLY@31..32 "}"
  WHITESPACE@32..33 "\n"