Method find

fdbclient/VersionedMap.cpp:51–51

	void insert(K const& k) { s.insert(k, 1); }
	result find(K const& k) const { return result(s.atLatest().find(k)); }
	result not_found() const { return result(s.atLatest().end()); }
	result begin() const { return result(s.atLatest().begin()); }
	result end() const { return result(s.atLatest().end()); }