enable lint prefer_generic_function_type_aliases (#21680)
diff --git a/packages/flutter_tools/test/src/mocks.dart b/packages/flutter_tools/test/src/mocks.dart
index 1aab448..408d111 100644
--- a/packages/flutter_tools/test/src/mocks.dart
+++ b/packages/flutter_tools/test/src/mocks.dart
@@ -109,7 +109,7 @@
}
/// A strategy for creating Process objects from a list of commands.
-typedef Process ProcessFactory(List<String> command);
+typedef ProcessFactory = Process Function(List<String> command);
/// A ProcessManager that starts Processes by delegating to a ProcessFactory.
class MockProcessManager implements ProcessManager {
