// - Accessory types - Callbacks - Data fetch hooks
typedefstd::function<void(
constproperty_tree::ptree// opted not to send str but already parsed structure - this may not be optimal but makes it so that e.g. emscr_async_bridge doesn't have to send the response as an escaped JSON string nor redundantly parse/stringify
constproperty_tree::ptree&// opted not to send str but already parsed structure - this may not be optimal but makes it so that e.g. emscr_async_bridge doesn't have to send the response as an escaped JSON string nor redundantly parse/stringify