전체 실행하는데 오류가 안납니다

package hi.hellospring.repository;import hi.hellospring.domain.Member;import java.util.HashMap;import java.util.*;import java.util.Map;import java.util.Optional;public class MemoryMemberRepository implements MemberRepository{ private Map,Member> store = new HashMap(); private static long sequence = 0L; @Override public Member save(Member member) { member.setId(++sequence); store.put(member.getId(), member); return member; } @Override public Optional findbyId(Long id) { return Optional.ofNullable(store.get(id)); // 널이 있어도 일단 실행 } @Override public Optional findbyName(String name) { return store.values().stream().filter(member -> member.getName().equals(name)).findAny();//람다식 공부해야함 / findany 하나라도 있으면 찾음 } @Override public List findAll() { return new ArrayList(store.values()); }}입니다