@brief sets the binary subtype @sa https://json.nlohmann.me/api/byte_container_with_subtype/set_subtype/

! send a file to the client * * @param[in] session ftp session * * @returns whether to call again */

@brief user-defined to_string function for JSON values @sa https://json.nlohmann.me/api/basic_json/to_string/

! @brief returns x - y @pre x.e == y.e and x.f >= y.f */

@brief return the binary subtype @sa https://json.nlohmann.me/api/byte_container_with_subtype/subtype/

@brief create a BJData serialization of a given JSON value @sa https://json.nlohmann.me/api/basic_json/to_bjdata/

@brief create a BSON serialization of a given JSON value @sa https://json.nlohmann.me/api/basic_json/to_bson/

Redefine to_int_type function

Redefine to_int_type function

@brief create a MessagePack serialization of a given JSON value @sa https://json.nlohmann.me/api/basic_json/to_msgpack/

@brief create a UBJSON serialization of a given JSON value @sa https://json.nlohmann.me/api/basic_json/to_ubjson/

! @brief determine the type prefix of container values */

KEY_UP/KEY_DOWN navigation. Edge presses move immediately and stamp the tick; a held direction repeats once now passes lastTick + REPEAT_DELAY_TICKS.