Bip32KeyIndex.unhardenIndex constructor
      
      Bip32KeyIndex.unhardenIndex(
    
- int index
 
Unharden the specified index and return it.
Implementation
factory Bip32KeyIndex.unhardenIndex(int index) {
  return Bip32KeyIndex(
      BitUtils.resetBit(index, Bip32KeyDataConst.keyIndexHardenedBitNum));
}