/* Is this interval writable? Replace later with cache access. */
#define INTERVAL_WRITABLE_P(i) \
(i && (NILP (textget ((i)->plist, Qread_only)) \
/* Is this interval writable? Replace later with cache access. */
#define INTERVAL_WRITABLE_P(i) \
(i && (NILP (textget ((i)->plist, Qread_only)) \