Method pushPage

fdbserver/VersionedBTree.actor.cpp:7450–7475

		void popPath() { path.pop_back(); }

		Future<Void> pushPage(const BTreePage::BinaryTree::Cursor& link) {
			debug_printf("pushPage(link=%s)\n", link.get().toString(false).c_str());
			return map(readPage(btree,
			                    reason,
			                    path.back().btPage()->height - 1,
			                    pager.getPtr(),
			                    link.get().getChildPage(),
			                    ioMaxPriority,
			                    false,
			                    true),
			           [=](Reference<const ArenaPage> p) {
#if REDWOOD_DEBUG
				           path.push_back({ p, btree->getCursor(p.getPtr(), link), link.get().getChildPage() });
#else
							path.push_back({ p, btree->getCursor(p.getPtr(), link) });
#endif

				           if (btree->m_pBoundaryVerifier != nullptr) {
					           ASSERT(btree->m_pBoundaryVerifier->verify(link.get().getChildPage().front(),
					                                                     pager->getVersion(),
					                                                     link.get().key,
					                                                     link.next().getOrUpperBound().key));
				           }
				           return Void();
			           });
		}

		Future<Void> pushPage(BTreeNodeLinkRef id) {
			debug_printf("pushPage(root=%s)\n", ::toString(id).c_str());