final SqlJetMemPage pPage = this;
int i; /* Loop counter */
int pc; /* Offset to cell content of cell being deleted */
ISqlJetMemoryPointer data; /* pPage->aData */
ISqlJetMemoryPointer ptr; /* Used to move bytes around within data[] */
assert (idx >= 0 && idx < pPage.nCell);
assert (sz == pPage.cellSize(idx));
assert (pPage.pBt.mutex.held());
data = pPage.aData;