@Override
		public boolean delete() throws IOException {
			if (hasLastKey) {
				hasLastKey = false;
				return deleteRecord(lastKey);
			}
			return false;
		}
Initialize (or re-initialize) iterator state.
An empty or null keys array will force a complete initialization.
Otherwise, following the deletethe keys array and keyIndex should reflect the state
following a delete.
@param targetKey the initial key.  For construction this is the startKey, 
following a delete this is the deleted key.
@throws IOException thrown if IO error occurs
Ghidra/Framework/DB/src/main/java/db/Table.java