Display synthetic nodes on status page

pkg/analysis_server/lib/src/status/ast_writer.dart

Index: pkg/analysis_server/lib/src/status/ast_writer.dart
diff --git a/pkg/analysis_server/lib/src/status/ast_writer.dart b/pkg/analysis_server/lib/src/status/ast_writer.dart
index 4d410d6486c7917806629f1ea4e018db042849a1..6cb30db6baf721c9669f3e9f181016f2d09ac37f 100644
--- a/pkg/analysis_server/lib/src/status/ast_writer.dart
+++ b/pkg/analysis_server/lib/src/status/ast_writer.dart
@@ -161,6 +161,9 @@ class AstWriter extends UnifyingAstVisitor with TreeWriter {
     buffer.write('..');
     buffer.write(node.offset + node.length - 1);
     buffer.write(']</span>');
+    if (node.isSynthetic) {
+      buffer.write(' (synthetic)');
+    }
     buffer.write('<br>');
   }
 }