void set_tracing_category(const char* category) { tracing_category_ = category ? category : ""; }
const std::string& get_tracing_category() const { return tracing_category_; }
bool has_tracing_category() { return not tracing_category_.empty(); }
void set_tracing_category(const char* category) { tracing_category_ = category ? category : ""; }
const std::string& get_tracing_category() const { return tracing_category_; }
bool has_tracing_category() { return not tracing_category_.empty(); }