code: @Nullable
    public IPasswordHashCreator getPasswordHashCreatorOfAlgorithm (@Nullable final String sAlgorithmName)
    {
      return m_aRWLock.readLocked ( () -> m_aPasswordHashCreators.get (sAlgorithmName));
    }
docs: Get the password hash creator of the specified algorithm name.
  
  @param sAlgorithmName
  The algorithm name to query. May be <code>null</code>.
  @return <code>null</code> if no such hash creator is registered.