Issue 28027. Move Null to the bottom in the Analyzer.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 325f7235511705dfbbd386a875b094eab0933dfb..c29be046eae2caa6b2598d853f422c789962d5e6 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -2402,8 +2402,11 @@ class FixProcessor {
 
   void _appendParameterForArgument(
       SourceBuilder sb, Set<String> excluded, int index, Expression argument) {
-    // append type name
     DartType type = argument.bestType;
+    if (type == null || type.isBottom || type.isDartCoreNull) {
+      type = DynamicTypeImpl.instance;
+    }
+    // append type name
     String typeSource = utils.getTypeSource(type, librariesToImport);
     if (typeSource != 'dynamic') {
       sb.startPosition('TYPE$index');