Revise the class Record Page so that its block is not pinned by the constructor but instead is pinned at the beginning of each get/set method. Similarly, the block is unpinned at the end of each...

Revise the class Record Page so that its block is not pinned by the constructor but instead is pinned at the beginning of each get/set method. Similarly, the block is unpinned at the end of each get/set method, thereby eliminating the need for a close method. Do you think this is better than the SimpleDB implementation? Explain.