The getter 'asListLiteral' was called on null.

[xiaocode337317439]

///
///Author: YoungChan
///Date: 2020-04-16 15:37:16
///LastEditors: YoungChan
///LastEditTime: 2020-04-22 20:33:59
///Description: file content
///
import 'package:flutter/material.dart';

class ListViewDSL extends StatefulWidget {
  @override
  _ListViewDSLState createState() => _ListViewDSLState();
}

class _ListViewDSLState extends State<ListViewDSL> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.red,
        title: Text(
          'ListViewDSL123',
          style: TextStyle(fontSize: 20, color: Colors.white),
        ),
        centerTitle: true,
      ),
      body: ListView.builder(
        itemBuilder: (context, index) {
          return Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            mainAxisSize: MainAxisSize.max,
            children: [
              Container(
                padding: EdgeInsets.only(left: 20, right: 20),
                alignment: Alignment.centerLeft,
                child: Text('Hellow World $index',
                    style: TextStyle(color: Colors.white, fontSize: 20)),
                color: Colors.black12,
                height: 50,
              ),
              Icon(
                Icons.ac_unit,
                size: 12,
                color: Colors.red,
              ),
            ],
          );
        },
        itemCount: 100,
      ),
    );
  }
}

// build code
dart lib/main.dart -f dslDemo/listview_dsl.dart
lib/main.dart: Warning: Interpreting this as package URI, 'package:dynamicflutter/main.dart'.

// result json
{"type":"Program","body":[{"type":"ClassDeclaration","id":{"type":"Identifier","name":"ListViewDSL"},"superClause":{"type":"TypeName","name":"StatefulWidget"},"implementsClause":null,"mixinClause":null,"metadata":[],"body":[{"type":"MethodDeclaration","id":{"type":"Identifier","name":"createState"},"parameters":{"type":"FormalParameterList","parameterList":[]},"typeParameters":null,"body":null,"isAsync":false,"returnType":{"type":"TypeName","name":"_ListViewDSLState"}}]},{"type":"ClassDeclaration","id":{"type":"Identifier","name":"_ListViewDSLState"},"superClause":{"type":"TypeName","name":"State"},"implementsClause":null,"mixinClause":null,"metadata":[],"body":[{"type":"MethodDeclaration","id":{"type":"Identifier","name":"build"},"parameters":{"type":"FormalParameterList","parameterList":[{"type":"SimpleFormalParameter","paramType":{"type":"TypeName","name":"BuildContext"},"name":"context"}]},"typeParameters":null,"body":{"type":"BlockStatement","body":[{"type":"ReturnStatement","argument":{"type":"MethodInvocation","callee":{"type":"Identifier","name":"Scaffold"},"typeArguments":null,"argumentList":{"type":"ArgumentList","argumentList":[{"type":"NamedExpression","id":{"type":"Identifier","name":"appBar"},"expression":{"type":"MethodInvocation","callee":{"type":"Identifier","name":"AppBar"},"typeArguments":null,"argumentList":{"type":"ArgumentList","argumentList":[{"type":"NamedExpression","id":{"type":"Identifier","name":"backgroundColor"},"expression":{"type":"PrefixedIdentifier","identifier":{"type":"Identifier","name":"red"},"prefix":{"type":"Identifier","name":"Colors"}}},{"type":"NamedExpression","id":{"type":"Identifier","name":"title"},"expression":{"type":"MethodInvocation","callee":{"type":"Identifier","name":"Text"},"typeArguments":null,"argumentList":{"type":"ArgumentList","argumentList":[{"type":"StringLiteral","value":"ListViewDSL123"},{"type":"NamedExpression","id":{"type":"Identifier","name":"style"},"expression":{"type":"MethodInvocation","callee":{"type":"Identifier","name":"TextStyle"},"typeArguments":null,"argumentList":{"type":"ArgumentList","argumentList":[{"type":"NamedExpression","id":{"type":"Identifier","name":"fontSize"},"expression":{"type":"NumericLiteral","value":20}},{"type":"NamedExpression","id":{"type":"Identifier","name":"color"},"expression":{"type":"PrefixedIdentifier","identifier":{"type":"Identifier","name":"white"},"prefix":{"type":"Identifier","name":"Colors"}}}]}}}]}}},{"type":"NamedExpression","id":{"type":"Identifier","name":"centerTitle"},"expression":{"type":"BooleanLiteral","value":true}}]}}},{"type":"NamedExpression","id":{"type":"Identifier","name":"body"},"expression":{"type":"MethodInvocation","callee":{"type":"MemberExpression","object":{"type":"Identifier","name":"ListView"},"property":{"type":"Identifier","name":"builder"}},"typeArguments":null,"argumentList":{"type":"ArgumentList","argumentList":[{"type":"NamedExpression","id":{"type":"Identifier","name":"itemBuilder"},"expression":{"type":"FunctionExpression","parameters":{"type":"FormalParameterList","parameterList":[{"type":"SimpleFormalParameter","paramType":null,"name":"context"},{"type":"SimpleFormalParameter","paramType":null,"name":"index"}]},"body":{"type":"BlockStatement","body":[{"type":"ReturnStatement","argument":{"type":"MethodInvocation","callee":{"type":"Identifier","name":"Row"},"typeArguments":null,"argumentList":{"type":"ArgumentList","argumentList":[{"type":"NamedExpression","id":{"type":"Identifier","name":"mainAxisAlignment"},"expression":{"type":"PrefixedIdentifier","identifier":{"type":"Identifier","name":"spaceBetween"},"prefix":{"type":"Identifier","name":"MainAxisAlignment"}}},{"type":"NamedExpression","id":{"type":"Identifier","name":"mainAxisSize"},"expression":{"type":"PrefixedIdentifier","identifier":{"type":"Identifier","name":"max"},"prefix":{"type":"Identifier","name":"MainAxisSize"}}},{"type":"NamedExpression","id":{"type":"Identifier","name":"children"},"expression":null}]}}}]},"isAsync":false}},{"type":"NamedExpression","id":{"type":"Identifier","name":"itemCount"},"expression":{"type":"NumericLiteral","value":100}}]}}}]}}}]},"isAsync":false,"returnType":{"type":"TypeName","name":"Widget"}}]}]}

// error
The following NoSuchMethodError was thrown building:
The getter 'asListLiteral' was called on null.
Receiver: null
Tried calling: asListLiteral