code: @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
      public static boolean hasBluetoothLEFeature(PackageManager manager) {
          return manager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE);
      }
docs: Checks if the device has a bluetooth low energy.
  @param manager the package manager.
  @return {@code true} if the device has a bluetooth low energy.