Document example of extending an existing GIO extension point
Submitted by Philip Withnall
At the moment, the documentation for GIOExtensionPoint only gives an example for creating a new extension point and extending it. It would be helpful if there was a second example showing how to extend an existing extension point (such as G_PROXY_RESOLVER_EXTENSION_POINT_NAME). At the moment, it’s unclear how to write code to ensure the extension point is registered first, to avoid: GLib-GIO-WARNING **: Tried to implement non-registered extension point gio-proxy-resolver
This is with GLib 9675bcc5.