SOURCE_FILE@0..58
  FN@0..26
    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 " "
    RET_TYPE@9..23
      THIN_ARROW@9..11 "->"
      WHITESPACE@11..12 " "
      PATH_TYPE@12..23
        PATH@12..23
          PATH_SEGMENT@12..23
            NAME_REF@12..15
              IDENT@12..15 "Box"
            GENERIC_ARG_LIST@15..23
              L_ANGLE@15..16 "<"
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                DYN_TRAIT_TYPE@16..22
                  TYPE_BOUND_LIST@16..22
                    TYPE_BOUND@16..17
                      PATH_TYPE@16..17
                        PATH@16..17
                          PATH_SEGMENT@16..17
                            NAME_REF@16..17
                              IDENT@16..17 "T"
                    WHITESPACE@17..18 " "
                    PLUS@18..19 "+"
                    WHITESPACE@19..20 " "
                    TYPE_BOUND@20..22
                      LIFETIME@20..22
                        LIFETIME_IDENT@20..22 "\'f"
              R_ANGLE@22..23 ">"
    WHITESPACE@23..24 " "
    BLOCK_EXPR@24..26
      L_CURLY@24..25 "{"
      R_CURLY@25..26 "}"
  WHITESPACE@26..27 "\n"
  FN@27..57
    FN_KW@27..29 "fn"
    WHITESPACE@29..30 " "
    NAME@30..33
      IDENT@30..33 "foo"
    PARAM_LIST@33..35
      L_PAREN@33..34 "("
      R_PAREN@34..35 ")"
    WHITESPACE@35..36 " "
    RET_TYPE@36..54
      THIN_ARROW@36..38 "->"
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      PATH_TYPE@39..54
        PATH@39..54
          PATH_SEGMENT@39..54
            NAME_REF@39..42
              IDENT@39..42 "Box"
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              L_ANGLE@42..43 "<"
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                DYN_TRAIT_TYPE@43..53
                  DYN_KW@43..46 "dyn"
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                    TYPE_BOUND@47..48
                      PATH_TYPE@47..48
                        PATH@47..48
                          PATH_SEGMENT@47..48
                            NAME_REF@47..48
                              IDENT@47..48 "T"
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                      LIFETIME@51..53
                        LIFETIME_IDENT@51..53 "\'f"
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    WHITESPACE@54..55 " "
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      L_CURLY@55..56 "{"
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  WHITESPACE@57..58 "\n"