SOURCE_FILE@0..19
  FN@0..18
    UNSAFE_KW@0..6 "unsafe"
    WHITESPACE@6..7 " "
    FN_KW@7..9 "fn"
    WHITESPACE@9..10 " "
    NAME@10..13
      IDENT@10..13 "foo"
    PARAM_LIST@13..15
      L_PAREN@13..14 "("
      R_PAREN@14..15 ")"
    WHITESPACE@15..16 " "
    BLOCK_EXPR@16..18
      L_CURLY@16..17 "{"
      R_CURLY@17..18 "}"
  WHITESPACE@18..19 "\n"