51 class PollCopyVariable : public Variable<T> {
58   PollCopyVariable(const std::string& name,  in PollCopyVariable()  function
66   PollCopyVariable(const std::string& name, const T& ref, const bool* is_set_p)  in PollCopyVariable()  function
67       : PollCopyVariable(name, ref, is_set_p, std::string()) {}  in PollCopyVariable()
68   PollCopyVariable(const std::string& name, const T& ref)  in PollCopyVariable()  function
69       : PollCopyVariable(name, ref, nullptr) {}  in PollCopyVariable()
71   PollCopyVariable(const std::string& name,  in PollCopyVariable()  function
80   PollCopyVariable(const std::string& name,  in PollCopyVariable()  function
84       : PollCopyVariable(name, poll_interval, ref, is_set_p, std::string()) {}  in PollCopyVariable()
85   PollCopyVariable(const std::string& name,  in PollCopyVariable()  function
88       : PollCopyVariable(name, poll_interval, ref, nullptr) {}  in PollCopyVariable()