fix code completion in conditional expressions

pkg/analysis_server/lib/src/services/completion/optype.dart

Index: pkg/analysis_server/lib/src/services/completion/optype.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/optype.dart b/pkg/analysis_server/lib/src/services/completion/optype.dart
index 7b06919ed2ab5c8b36f5693de26ce1da84377043..69b2af1b1b3ad7684d04a75cd32cda71534a0c9a 100644
--- a/pkg/analysis_server/lib/src/services/completion/optype.dart
+++ b/pkg/analysis_server/lib/src/services/completion/optype.dart
@@ -194,6 +194,12 @@ class _OpTypeAstVisitor extends GeneralizingAstVisitor {
   }
 
   @override
+  void visitConditionalExpression(ConditionalExpression node) {
+    optype.includeReturnValueSuggestions = true;
+    optype.includeTypeNameSuggestions = true;
+  }
+
+  @override
   visitConstructorName(ConstructorName node) {
     // some PrefixedIdentifier nodes are transformed into
     // ConstructorName nodes during the resolution process.