SOURCE_FILE@0..25
  FN@0..24
    CONST_KW@0..5 "const"
    WHITESPACE@5..6 " "
    UNSAFE_KW@6..12 "unsafe"
    WHITESPACE@12..13 " "
    FN_KW@13..15 "fn"
    WHITESPACE@15..16 " "
    NAME@16..19
      IDENT@16..19 "foo"
    PARAM_LIST@19..21
      L_PAREN@19..20 "("
      R_PAREN@20..21 ")"
    WHITESPACE@21..22 " "
    BLOCK_EXPR@22..24
      L_CURLY@22..23 "{"
      R_CURLY@23..24 "}"
  WHITESPACE@24..25 "\n"