SOURCE_FILE@0..18
  EXTERN_CRATE@0..17
    EXTERN_KW@0..6 "extern"
    WHITESPACE@6..7 " "
    CRATE_KW@7..12 "crate"
    WHITESPACE@12..13 " "
    NAME_REF@13..16
      IDENT@13..16 "foo"
    SEMICOLON@16..17 ";"
  WHITESPACE@17..18 "\n"