28         LOG(ERROR) << __func__ << ": bad args; stat is null";  in get()
36             LOG(ERROR) << __func__ << ": a data provider failed";  in get()
49         LOG(ERROR) << __func__ << ": bad args; interval is null";  in get()
57             LOG(ERROR) << __func__ << ": a provider is missing";  in get()
64             LOG(ERROR) << __func__ << ": a data provider failed";  in get()
76         LOG(ERROR) << __func__ << ": bad args; output is null";  in dump()
83             LOG(ERROR) << __func__ << ": a provider is missing";  in dump()
93         LOG(ERROR) << __func__ << ": bad args; stat is null";  in get()
102         LOG(ERROR) << __func__ << ": bad args; interval is null";  in get()
107         LOG(ERROR) << __func__ << ": bad args; start is incorrect type";  in get()
112         LOG(ERROR) << __func__ << ": unable to retrieve stats";  in get()
121         LOG(ERROR) << __func__ << ": bad args; output is null";  in dump()
126         LOG(ERROR) << __func__ << ": bad args; stat is incorrect type";  in dump()