SOURCE_FILE@0..21
  TYPE_ALIAS@0..20
    TYPE_KW@0..4 "type"
    WHITESPACE@4..5 " "
    NAME@5..6
      IDENT@5..6 "F"
    WHITESPACE@6..7 " "
    EQ@7..8 "="
    WHITESPACE@8..9 " "
    FN_PTR_TYPE@9..19
      FN_KW@9..11 "fn"
      PARAM_LIST@11..13
        L_PAREN@11..12 "("
        R_PAREN@12..13 ")"
      WHITESPACE@13..14 " "
      RET_TYPE@14..19
        THIN_ARROW@14..16 "->"
        WHITESPACE@16..17 " "
        TUPLE_TYPE@17..19
          L_PAREN@17..18 "("
          R_PAREN@18..19 ")"
    SEMICOLON@19..20 ";"
  WHITESPACE@20..21 "\n"