SOURCE_FILE@0..29
  TYPE_ALIAS@0..28
    TYPE_KW@0..4 "type"
    WHITESPACE@4..5 " "
    NAME@5..6
      IDENT@5..6 "F"
    WHITESPACE@6..7 " "
    EQ@7..8 "="
    WHITESPACE@8..9 " "
    PATH_TYPE@9..27
      PATH@9..27
        PATH_SEGMENT@9..27
          NAME_REF@9..12
            IDENT@9..12 "Box"
          GENERIC_ARG_LIST@12..27
            L_ANGLE@12..13 "<"
            TYPE_ARG@13..26
              PATH_TYPE@13..26
                PATH@13..26
                  PATH_SEGMENT@13..26
                    NAME_REF@13..15
                      IDENT@13..15 "Fn"
                    PARAM_LIST@15..20
                      L_PAREN@15..16 "("
                      PARAM@16..19
                        PATH_TYPE@16..19
                          PATH@16..19
                            PATH_SEGMENT@16..19
                              NAME_REF@16..19
                                IDENT@16..19 "i32"
                      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 ")"
            R_ANGLE@26..27 ">"
    SEMICOLON@27..28 ";"
  WHITESPACE@28..29 "\n"