suggest "deferred as" rather than "deferred"

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

Index: pkg/analysis_server/lib/src/services/completion/keyword_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/keyword_contributor.dart b/pkg/analysis_server/lib/src/services/completion/keyword_contributor.dart
index 33dfa582edeafd2d34cab6c3e9cdd7616e9da28f..6cbfb014ee2f966fffed9d4c5bc626ccc2bb925a 100644
--- a/pkg/analysis_server/lib/src/services/completion/keyword_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/keyword_contributor.dart
@@ -355,12 +355,24 @@ class _KeywordVisitor extends GeneralizingAstVisitor {
   }
 
   void _addImportDirectiveKeywords(ImportDirective node) {
-    if (node.asKeyword == null) {
+    bool hasDeferredKeyword = node.deferredKeyword != null;
+    bool hasAsKeyword = node.asKeyword != null;
+    if (!hasAsKeyword) {
       _addSuggestion(Keyword.AS, DART_RELEVANCE_HIGH);
-      if (node.deferredKeyword == null) {
+    }
+    if (!hasDeferredKeyword) {
+      if (!hasAsKeyword) {
+        _addSuggestion2('deferred as', relevance: DART_RELEVANCE_HIGH);
+      } else if (entity == node.asKeyword) {
         _addSuggestion(Keyword.DEFERRED, DART_RELEVANCE_HIGH);
       }
     }
+    if (!hasDeferredKeyword || hasAsKeyword) {
+      if (node.combinators.isEmpty) {
+        _addSuggestion2('show', relevance: DART_RELEVANCE_HIGH);
+        _addSuggestion2('hide', relevance: DART_RELEVANCE_HIGH);
+      }
+    }
   }
 
   void _addStatementKeywords(AstNode node) {