init method
Implementation
static init({@required Map options, Function callback}) {
if (Janus.initDone) {
Janus.log("Library alreaday Initialised");
if (callback is Function) callback();
} else {
if (options['debug'] != null) debugLevel = options['debug'];
logger = Logger();
Janus.log("Initializing library");
initDone = true;
if (callback is Function) callback();
}
}