Commit missing files during merge

Author: ThangVuNguyenViet

packages/go_router/lib/src/information_provider.dart

@@ -178,33 +178,6 @@ class GoRouteInformationProvider extends RouteInformationProvider
     );
   }
 
-  /// Relatively go to [relativeLocation].
-  void goRelative(String relativeLocation, {Object? extra}) {
-    assert(
-      !relativeLocation.startsWith('/'),
-      "Relative locations must not start with a '/'.",
-    );
-
-    final Uri currentUri = value.uri;
-    Uri newUri = Uri.parse(
-      currentUri.path.endsWith('/')
-          ? '${currentUri.path}$relativeLocation'
-          : '${currentUri.path}/$relativeLocation',
-    );
-    newUri = newUri.replace(queryParameters: <String, dynamic>{
-      ...currentUri.queryParameters,
-      ...newUri.queryParameters,
-    });
-
-    _setValue(
-      newUri.toString(),
-      RouteInformationState<void>(
-        extra: extra,
-        type: NavigatingType.go,
-      ),
-    );
-  }
-
   /// Restores the current route matches with the `matchList`.
   void restore(String location, {required RouteMatchList matchList}) {
     _setValue(

packages/go_router/lib/src/path_utils.dart

@@ -119,6 +119,21 @@ String concatenatePaths(String parentPath, String childPath) {
   return '${parentPath == '/' ? '' : parentPath}/$childPath';
 }
 
+/// Concatenates two Uri. It will [concatenatePaths] the parent's and the child's paths , then merges their query parameters.
+///
+/// e.g: pathA = /a?fid=f1, pathB = c/d?pid=p2,  concatenatePaths(pathA, pathB) = /a/c/d?fid=1&pid=2.
+Uri concatenateUris(Uri parentUri, Uri childUri) {
+  final Uri newUri = parentUri.replace(
+    path: concatenatePaths(parentUri.path, childUri.path),
+    queryParameters: <String, dynamic>{
+      ...parentUri.queryParameters,
+      ...childUri.queryParameters,
+    },
+  );
+
+  return newUri;
+}
+
 /// Normalizes the location string.
 String canonicalUri(String loc) {
   if (loc.isEmpty) {