mrg method
Implementation
Map<String,dynamic> mrg( a, b) {
final List keys1 = a is Map?a.keys.toList():(a as List<int>).toList();
final Map<String,dynamic> o = {};
for (final k in keys1){
o[k] = a[k];
}
final List keys2 = b is Map?b.keys.toList():(b as List<int>).toList();
for (final k in keys2){
o[k] = b[k];
}
return o;
}