code: public void setDiagnostics (@Nullable final String sDiagnostics)
    {
      if (StringHelper.hasText (sDiagnostics))
        setDiagnostics (RegExHelper.getSplitToList (sDiagnostics.trim (), "\\s+"));
      else
        m_aDiagnostics = null;
    }
docs: Set the diagnostics, as an IDREFS value (multiple IDREF values separated by
  spaces)
  
  @param sDiagnostics
  The value to be set. May be <code>null</code>.