getPath method
Implementation
dynamic getPath(List<String> keys, [dynamic def]) {
if (keys.isEmpty) return def;
if (keys.length == 1) return get(keys[0]);
var val = getAsMap(keys[0]);
if (val == null) return def;
for (var i = 1; i < keys.length; i++) {
var k = keys[i];
var v = val?[k] as Map?;
if (v == null) return def;
val = v;
}
return val;
}