hashmap-vs-variantdict.rs

            let test = dict.lookup::<HashMap<String, glib::Variant>>("channelVolumes");
            if let Ok(Some(test)) = test {
                for (index_str, v) in test.iter() {
                    let index: u32 = index_str.parse().expect("erroneous index");
                    let map: HashMap<String, glib::Variant> = v.get().unwrap();
                    let volume = map.get("volume").and_then(|x|x.get::<f64>());
                    let channelname = map.get("channel").and_then(|x|x.get::<String>()).unwrap_or_default();
                    let channel = t_audiochannel.find_value_from_short_name(&channelname);

                    if let (Some(c), Some(v)) = (channel, volume) {
                        wp::log::info!("Index: {index}, Number: {} = {}", c.number(), v);
                        self.set_channel_volume(index, v as f32); // TODO: get index via channel map, index of vardict must not be relied upon
                    } else {
                        wp::log::critical!("Got invalid data via mixer-api");
                    }
                }
            } else {
                wp::log::critical!("Cannot get channel volumes via mixer-api");
            }

            let result = dict.lookup::<glib::VariantDict>("channelVolumes");
            if let Ok(Some(channel_volumes)) = result {
                for v in channel_volumes.to_variant().iter() {
                    let index_str: String = v.child_get(0);
                    let index: u32 = index_str.parse().expect("erroneous index");
                    if let Ok(Some(v2)) = v.try_child_get::<glib::Variant>(1) {
                        let dict: glib::VariantDict = v2.into();
                        let channelname: Option<String> = dict.lookup("channel").map_or(None, |x|x);
                        let channel = t_audiochannel.find_value_from_short_name(&channelname.unwrap_or_default());
                        let volume: Option<f64> = dict.lookup("volume").map_or(None, |x|x);

                        if let (Some(c), Some(v)) = (channel, volume) {
                            wp::log::info!("Index: {index}, Number: {} = {}", c.number(), v);
                            self.set_channel_volume(index, v as f32); // TODO: get index via channel map, index of vardict must not be relied upon
                        } else {
                            wp::log::critical!("Got invalid data via mixer-api");
                        }
                    }
                }
            } else {
                wp::log::critical!("Cannot get channel volumes via mixer-api");
            }