Constant rust_ocpp::v1_6::messages::change_configuration::CONNECTION_TIME_OUT

pub const CONNECTION_TIME_OUT: &str = "ConnectionTimeOut";

From OCPP Specification

Interval *from beginning of status: ‘Preparing’ until incipient Transaction is automatically canceled, due to failure of EV driver to (correctly) insert the charging cable connector(s) into the appropriate socket(s). The Charge Point SHALL go back to the original state, probably: ‘Available’.