26 virtual const std::map<std::string, std::string>&
getMap()
const = 0;
30 virtual const std::string&
get(
const std::string& key)
const = 0;
35 virtual void set(
const std::string& key,
const std::string& value) = 0;
39 virtual bool has(
const std::string& key)
const = 0;