SOURCE_FILE@0..37
  TYPE_ALIAS@0..36
    EXISTENTIAL_KW@0..11 "existential"
    WHITESPACE@11..12 " "
    TYPE_KW@12..16 "type"
    WHITESPACE@16..17 " "
    NAME@17..20
      IDENT@17..20 "Foo"
    COLON@20..21 ":"
    WHITESPACE@21..22 " "
    TYPE_BOUND_LIST@22..35
      TYPE_BOUND@22..35
        PATH_TYPE@22..35
          PATH@22..35
            PATH_SEGMENT@22..35
              NAME_REF@22..24
                IDENT@22..24 "Fn"
              PARAM_LIST@24..26
                L_PAREN@24..25 "("
                R_PAREN@25..26 ")"
              WHITESPACE@26..27 " "
              RET_TYPE@27..35
                THIN_ARROW@27..29 "->"
                WHITESPACE@29..30 " "
                PATH_TYPE@30..35
                  PATH@30..35
                    PATH_SEGMENT@30..35
                      NAME_REF@30..35
                        IDENT@30..35 "usize"
    SEMICOLON@35..36 ";"
  WHITESPACE@36..37 "\n"