@Override
	public boolean hasPreviousLeaf() throws IOException {
		int prevLeafId = buffer.getInt(PREV_LEAF_ID_OFFSET);
		return (prevLeafId >= 0);
	}
Get this leaf node's right sibling
@return this leaf node's right sibling or null if right sibling does not exist.
@throws IOException thrown if an IO error occurs
Ghidra/Framework/DB/src/main/java/db/VarKeyRecordNode.java