title: Flutter how to set margin for particular widget in a form
body: <p>// here is my main.dart file</p>
  
  <pre><code>class UserRegistrationPage extends StatefulWidget {
       @override
    UserRegistrationPageState createState() =&gt; UserRegistrationPageState();
   }
  
   class UserRegistrationPageState extends State&lt;UserRegistrationPage&gt;{
  
     @override
       Widget build(BuildContext context) {
      return MaterialApp(
        home: new Scaffold(
          body: new SingleChildScrollView(
            child: new Container(
              child: new Form(
                child: formUi(),
              ),
            ),
          ),
        ),
          );
    }
    Widget formUi(){
      return new Column(
         children: &lt;Widget&gt;[
          new Image(
                  image: new AssetImage("assets/bgtopbar.png"),
                  fit: BoxFit.cover,
          ),
           new TextFormField(
                    //  margin: new EdgeInsets.all(15.0),
             decoration: new InputDecoration(hintText: 'Mobile Number'),
             keyboardType: TextInputType.phone,
             maxLength: 10,
           ),
           new TextFormField(
             decoration: new InputDecoration(hintText: 'First Name'),
             maxLength: 20, 
           ),
           new TextFormField(
             decoration: new InputDecoration(hintText: 'Last Name'),
             maxLength: 20,
           ),
           new TextFormField(
             decoration: new InputDecoration(hintText: 'Gender'),
             maxLength: 10,
           ),
         ],
      );
    }
  </code></pre>
  
  <p>I want to set margin only the edit text field in the form i don't want to set for image.How can i give margin for individual widget in a form.i know this question is very simple but i am new to flutter so help me to sort out this problem</p>