}
int cIdx = getCursorIndex(cursor);
BIN cBin = getCursorBIN(cursor);
assert cBin == this :
"nodeId=" + getNodeId() +
" cursor=" + cursor.dumpToString(true);
assert newSibling instanceof BIN;
/*
* There are four cases to consider for cursor adjustments,
* depending on (1) how the existing node gets split, and (2) where