PER_BUFFER_SYMBOL 1399 src/buffer.c         && SYMBOLP (PER_BUFFER_SYMBOL (offset)))
PER_BUFFER_SYMBOL 1401 src/buffer.c         sym = NILP (sym) ? PER_BUFFER_SYMBOL (offset) : sym;
PER_BUFFER_SYMBOL 4970 src/buffer.c     XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym);