SOURCE_FILE@0..12
  IMPL_DEF@0..11
    IMPL_KW@0..4 "impl"
    WHITESPACE@4..5 " "
    PATH_TYPE@5..8
      PATH@5..8
        PATH_SEGMENT@5..8
          NAME_REF@5..8
            IDENT@5..8 "Foo"
    WHITESPACE@8..9 " "
    ITEM_LIST@9..11
      L_CURLY@9..10 "{"
      R_CURLY@10..11 "}"
  WHITESPACE@11..12 "\n"