SOURCE_FILE@0..10
  EXTERN_BLOCK@0..9
    ABI@0..6
      EXTERN_KW@0..6 "extern"
    WHITESPACE@6..7 " "
    EXTERN_ITEM_LIST@7..9
      L_CURLY@7..8 "{"
      R_CURLY@8..9 "}"
  WHITESPACE@9..10 "\n"
