NotNorom

// See https://stackoverflow.com/questions/67727239/how-to-combine-including-nested-array-values-two-serde-yamlvalue-objects
// Note this is not https://docs.rs/serde_yaml/latest/serde_yaml/value/enum.Value.html#method.apply_merge

use serde::{Serialize, Deserialize};
use serde_yaml::Value;

fn merge_yaml(a: &mut serde_yaml::Value, b: serde_yaml::Value) {
    match (a, b) {
        (a @ &mut serde_yaml::Value::Mapping(_), serde_yaml::Value::Mapping(b)) => {
            let a = a.as_mapping_mut().unwrap();