/**
  * Complete a {@link WriteEntry} that was created by {@link #beginMemstoreInsert()}.
  *
  * <p>At the end of this call, the global read point is at least as large as the write point of
  * the passed in WriteEntry. Thus, the write is visible to MVCC readers.
  */
 public void completeMemstoreInsert(WriteEntry e) {
   advanceMemstore(e);
   waitForRead(e);
 }