SOURCE_FILE@0..30
  FN@0..11
    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..11
      L_CURLY@9..10 "{"
      R_CURLY@10..11 "}"
  WHITESPACE@11..12 "\n"
  FN@12..29
    FN_KW@12..14 "fn"
    WHITESPACE@14..15 " "
    NAME@15..18
      IDENT@15..18 "bar"
    PARAM_LIST@18..20
      L_PAREN@18..19 "("
      R_PAREN@19..20 ")"
    WHITESPACE@20..21 " "
    RET_TYPE@21..26
      THIN_ARROW@21..23 "->"
      WHITESPACE@23..24 " "
      TUPLE_TYPE@24..26
        L_PAREN@24..25 "("
        R_PAREN@25..26 ")"
    WHITESPACE@26..27 " "
    BLOCK_EXPR@27..29
      L_CURLY@27..28 "{"
      R_CURLY@28..29 "}"
  WHITESPACE@29..30 "\n"