Code structure

lib/entity_widgets/entity_page_container.dart

@@ -0,0 +1,14 @@
+part of '../main.dart';
+
+class EntityPageContainer extends StatelessWidget {
+  EntityPageContainer({Key key, @required this.children}) : super(key: key);
+
+  final List<Widget> children;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListView(
+      children: children,
+    );
+  }
+}