rand dart fix

deprecated/flutter_data_view/lib/src/tag_list/screen.dart

@@ -51,10 +51,8 @@ class _TaggedDataViewState<T> extends State<TaggedDataView<T>> {
     final allTags = [...folders, ...other].toSet().toList();
     allTags.sort();
     final emptyBuilder = () {
-      if (widget?.emptyBuilder != null) {
-        return widget.emptyBuilder(context);
-      }
-      return Scaffold(
+      return widget.emptyBuilder(context);
+          return Scaffold(
         appBar: AppBar(
           centerTitle: false,
           title: Text('Details'),
@@ -66,10 +64,8 @@ class _TaggedDataViewState<T> extends State<TaggedDataView<T>> {
     };
     final detailBuilder = (int index) {
       final T item = widget.dataSource.items[index];
-      if (widget?.detailBuilder != null) {
-        return widget.detailBuilder(context, item, index);
-      }
-      return Scaffold(
+      return widget.detailBuilder(context, item, index);
+          return Scaffold(
         appBar: AppBar(
           centerTitle: false,
           title: Text('Details'),

deprecated/flutter_data_view/lib/src/tag_list/source.dart

@@ -30,7 +30,6 @@ abstract class TaggedDataTableSource<T> extends DataSource<T> {
       }
       return Icons.info;
     };
-    if (iconData() == null) return null;
     return Icon(iconData());
   }
 
@@ -64,16 +63,12 @@ abstract class TaggedDataTableSource<T> extends DataSource<T> {
     final _results = <int, DataRow>{};
     for (var i = 0; i < rowCount; i++) {
       final tags = getTagsForRow(i);
-      if (_selected == null) {
-        _results[i] = getRow(i);
-      } else {
-        for (final tag in tags) {
-          if (tag.contains(_selected)) {
-            _results[i] = getRow(i);
-          }
+      for (final tag in tags) {
+        if (tag.contains(_selected)) {
+          _results[i] = getRow(i);
         }
       }
-    }
+        }
     final search = this.search.toLowerCase();
     if (search.isEmpty) return _results;
     _results.clear();