code: @Nullable
    @IsLocked (ELockType.READ)
    protected final IMPLTYPE getOfID (@Nullable final String sID)
    {
      if (StringHelper.hasNoText (sID))
        return null;
  
      return m_aRWLock.readLocked ( () -> m_aMap.get (sID));
    }
docs: Find the element with the provided ID. Locking is done internally.
  
  @param sID
  The ID to search. May be <code>null</code>.
  @return <code>null</code> if no such item exists