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+package org.finikes.sider.strategy;%0A%0Aimport java.util.List;%0Aimport java.util.Map;%0A%0Apublic interface Strategy %7B%0A%09public Map%3CString, List%3CString%3E%3E filter(Map%3CString, List%3CString%3E%3E keysSection);%0A%7D%0A

Create Strategy.java