SV = PV(0x2352069fd80) at 0x235206db678
  REFCNT = 1
  FLAGS = (POK,IsCOW,pPOK)               <- IsCOW = Shared buffer
  PV = 0x2352275d050 "zzz...zzz"\0
  CUR = 60
  LEN = 64
  COW_REFCNT = 1
SV = PV(0x2352069fd80) at 0x235206db678
  REFCNT = 1
  FLAGS = (POK,pPOK)                     <- No longer sharing a buffer
  PV = 0x2352279a8a0 "Hello there"\0     <- New buffer at new address
  CUR = 11
  LEN = 16