<field type="PBUFFER" name="glx_pbuffer" />
<field type="glx:PIXMAP" name="glx_pixmap" />
<field type="glx:WINDOW" name="glx_window" />
<field type="PBUFFER" name="glx_pbuffer" />
<field type="glx:PIXMAP" name="glx_pixmap" />
<field type="glx:WINDOW" name="glx_window" />