private void startDiscovery(){
  if (isScanning()) {
    LOG.warn("Not starting discovery, because already scanning.");
    return;
  }
  startDiscovery(Scanning.SCANNING_BT);
}

private void startDiscovery ( ) { if ( isScanning ( ) ) { LOG . warn ( "Not starting discovery, because already scanning." ) ; return ; } startDiscovery ( Scanning . SCANNING_BT ) ; }
pre : bluetooth is available , enabled and scanning is off . post : bt is discovering
