private void OnEnable()
{
keyMap = new KeyMap();
replMode = new Mode("repl", keyMap: keyMap);
replBuffer = new Buffer("repl");
replBuffer.EnabeMajorMode(replMode);
replBuffer.EnabeMinorMode(ReadLine.Instance);
replBuffer.Enable();
ReadLine.Instance.AutoCompletionListener += AutoCompletionHandler;
// define some functions
NativeFunction.Define("help", Help, "Display short help for commands.");
NativeFunction.Define("man", Man, "Display manual for the command. It works only if 'man' contains manual for given command.");
ReadLine.Instance.Read(prompt, Evaluate);
Application.logMessageReceived += HandleLog;
}