suggest loadLibrary is import is deferred

pkg/analysis_server/test/services/completion/prefixed_element_contributor_test.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 test.services.completion.invocation;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
@@ skipping 124 matching lines @@
       CompletionSuggestion suggestion = assertSuggestSetter('t');
       expect(suggestion.element.parameters, '(int value)');
     });
   }
 
   test_libraryPrefix() {
     // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
     addTestSource('import "dart:async" as bar; foo() {bar.^}');
     return computeFull((bool result) {
       assertSuggestClass('Future');
+      assertNotSuggested('loadLibrary');
     });
   }
 
   test_libraryPrefix2() {
     // SimpleIdentifier  MethodInvocation  ExpressionStatement
     addTestSource('import "dart:async" as bar; foo() {bar.^ print("f")}');
     return computeFull((bool result) {
       assertSuggestClass('Future');
     });
   }
 
+  test_libraryPrefix_deferred() {
+    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
+    addTestSource('import "dart:async" deferred as bar; foo() {bar.^}');
+    return computeFull((bool result) {
+      assertSuggestClass('Future');
+      assertSuggestFunction('loadLibrary', 'void');
+    });
+  }
+
   test_local() {
     addTestSource('foo() {String x = "bar"; x.^}');
     return computeFull((bool result) {
       assertSuggestGetter('length', 'int');
     });
   }
 
   test_local_is() {
     addTestSource('foo() {var x; if (x is String) x.^}');
     return computeFull((bool result) {
@@ skipping 341 matching lines @@
 }
 void test(Derived d) {
   d.^
 }
 ''');
     return computeFull((bool result) {
       assertSuggestMethod('f', 'Base', 'void');
     });
   }
 }