chore: fix analysis checks

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat_flutter/lib/src/multi_overlay.dart

@@ -0,0 +1,63 @@
+import 'package:collection/collection.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_portal/flutter_portal.dart';
+
+/// Widget that renders a single overlay widget from a list of [overlayOptions]
+/// It shows the first one that is visible
+class MultiOverlay extends StatelessWidget {
+  /// Constructs a new MultiOverlay widget
+  /// [overlayOptions] - the list of overlay options
+  /// [overlayAnchor] - the anchor relative to the overlay
+  /// [childAnchor] - the anchor relative to the child
+  /// [child] - the child widget
+  const MultiOverlay({
+    Key? key,
+    required this.overlayOptions,
+    required this.child,
+    required this.overlayAnchor,
+    required this.childAnchor,
+  }) : super(key: key);
+
+  /// The list of overlay options
+  final List<OverlayOptions> overlayOptions;
+
+  /// The child widget
+  final Widget child;
+
+  /// The anchor relative to the overlay
+  final Alignment? overlayAnchor;
+
+  /// The anchor relative to the child
+  final Alignment? childAnchor;
+
+  @override
+  Widget build(BuildContext context) {
+    final visibleOverlay =
+        overlayOptions.firstWhereOrNull((element) => element.visible);
+
+    return PortalEntry(
+      childAnchor: childAnchor,
+      portalAnchor: overlayAnchor,
+      visible: visibleOverlay != null,
+      portal: visibleOverlay?.widget,
+      child: child,
+    );
+  }
+}
+
+/// Class that contains the parameters for building an overlay entry
+class OverlayOptions {
+  /// Constructs a new overlay options object
+  /// [visible] - the visibility of the overlay
+  /// [widget] - the widget to be displayed
+  OverlayOptions({
+    required this.visible,
+    required this.widget,
+  });
+
+  /// the visibility of the overlay
+  final bool visible;
+
+  /// the widget to be displayed
+  final Widget widget;
+}