SOURCE_FILE@0..26
  FN@0..25
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..7
      IDENT@3..7 "main"
    PARAM_LIST@7..9
      L_PAREN@7..8 "("
      R_PAREN@8..9 ")"
    WHITESPACE@9..10 " "
    BLOCK_EXPR@10..25
      L_CURLY@10..11 "{"
      WHITESPACE@11..12 " "
      LET_STMT@12..23
        LET_KW@12..15 "let"
        WHITESPACE@15..16 " "
        WILDCARD_PAT@16..17
          UNDERSCORE@16..17 "_"
        WHITESPACE@17..18 " "
        EQ@18..19 "="
        WHITESPACE@19..20 " "
        TUPLE_EXPR@20..22
          L_PAREN@20..21 "("
          R_PAREN@21..22 ")"
        SEMICOLON@22..23 ";"
      WHITESPACE@23..24 " "
      R_CURLY@24..25 "}"
  WHITESPACE@25..26 "\n"