mapping data from firebase flutter code example
Example 1: flutter map dynamic
Map<String, dynamic> var = {'item': 0, 'name': 'John'}
Example 2: Map in dart
void main() {
var details = new Map();
details['Usrname'] = 'admin';
details['Password'] = 'admin@123';
print(details);
}
// Output
// {Usrname: admin, Password: admin@123}