o round trip is forced to the server; unlike most X calls that
            return a value, <code class="function">glXGetContextIDEXT</code> does not flush any pending events.
        </p><p>
            <code class="function">glXGetContextIDEXT</code> is part of the <code class="code">EXT_import_context</code> extension,
            not part of the core GLX command set. If _glxextstring(EXT_import_context)
            is included in the string returned by <a class="citerefentry" href="glXQueryExtensionsStri