suggest "deferred as" rather than "deferred"

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

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library services.completion.contributor.dart.keyword;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
@@ skipping 337 matching lines @@
     _addSuggestions([Keyword.FALSE, Keyword.NEW, Keyword.NULL, Keyword.TRUE,]);
     if (_inClassMemberBody(node)) {
       _addSuggestions([Keyword.SUPER, Keyword.THIS,]);
     }
     if (_inAsyncMethodOrFunction(node)) {
       _addSuggestion2(AWAIT);
     }
   }
 
   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) {
     if (_inClassMemberBody(node)) {
       _addSuggestions([Keyword.SUPER, Keyword.THIS,]);
     }
     if (_inAsyncMethodOrFunction(node)) {
       _addSuggestion2(AWAIT);
     }
     _addSuggestions([
@@ skipping 50 matching lines @@
         return false;
       }
       AstNode parent = body.parent;
       if (parent is ConstructorDeclaration || parent is MethodDeclaration) {
         return true;
       }
       node = parent;
     }
   }
 }