func (p *PageQueue) moveFromTo(pg Page, from, to *btree.BTree) { pageToMove := from.Delete(pg) if pageToMove == nil { // If we can't find our page in the from list, // we have to assume it is in the to list already. return } if pageToMove != pg { panic("Unrecongized page passed to ReclaimHigh or ReclaimLow") } insert(to, pageToMove) }