initialiseRaw method
Initialise raw - mraa_led_init_raw
Initialise a a MraaLedContext based on LED function name. The structure of a LED entry in sysfs is "devicename:colour:function" This method expects only one unique LED identifier which would be "function" name most often. For instance, initialiseRaw("user4")
Implementation
MraaLedContext initialiseRaw(String ledDev) =>
_impl.mraa_led_init_raw(ledDev.toNativeUtf8().cast<Char>());