Function soup_sys::soup_proxy_uri_resolver_get_proxy_uri_async

pub unsafe extern "C" fn soup_proxy_uri_resolver_get_proxy_uri_async(
    proxy_uri_resolver: *mut SoupProxyURIResolver, 
    uri: *mut SoupURI, 
    async_context: *mut GMainContext, 
    cancellable: *mut GCancellable, 
    callback: SoupProxyURIResolverCallback, 
    user_data: gpointer
)