// makes x's nextSibling and prevSibling point to itself private void removeFromSiblings(FibonacciHeapNode x) { if (x.nextSibling == x) return; x.nextSibling.prevSibling = x.prevSibling; x.prevSibling.nextSibling = x.nextSibling; x.nextSibling = x; x.prevSibling = x; }