code: @Nullable
    public ISessionScope getSessionScopeOfID (@Nullable final String sScopeID)
    {
      if (StringHelper.hasNoText (sScopeID))
        return null;
  
      return m_aRWLock.readLocked ( () -> m_aSessionScopes.get (sScopeID));
    }
docs: Get the session scope with the specified ID. If no such scope exists, no
  further actions are taken.
  
  @param sScopeID
  The ID to be resolved. May be <code>null</code>.
  @return <code>null</code> if no such scope exists.