suggest loadLibrary is import is deferred

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

Index: pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart b/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
index d31d3d19922dcd69ef223b6e6d365168403a7452..10c69c19643fd8ceef79cc2241f950ef6c125e05 100644
--- a/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
@@ -13,7 +13,9 @@ import 'package:analysis_server/src/services/completion/suggestion_builder.dart'
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 
-import '../../protocol_server.dart' show CompletionSuggestionKind;
+import '../../protocol_server.dart' as protocol;
+import '../../protocol_server.dart'
+    show CompletionSuggestion, CompletionSuggestionKind;
 
 /**
  * A contributor for calculating invocation / access suggestions
@@ -303,8 +305,6 @@ class _PrefixedIdentifierSuggestionBuilder
 
   @override
   Future<bool> visitPrefixElement(PrefixElement element) {
-    //TODO (danrubel) reimplement to use prefixElement.importedLibraries
-    // once that accessor is implemented and available in Dart
     bool modified = false;
     // Find the import directive with the given prefix
     for (Directive directive in request.unit.directives) {
@@ -317,6 +317,22 @@ class _PrefixedIdentifierSuggestionBuilder
                 CompletionSuggestionKind.INVOCATION, library,
                 request.target.containingNode.parent is TypeName);
             modified = true;
+            if (directive.deferredKeyword != null) {
+              String completion = 'loadLibrary';
+              CompletionSuggestion suggestion = new CompletionSuggestion(
+                  CompletionSuggestionKind.INVOCATION, DART_RELEVANCE_DEFAULT,
+                  completion, completion.length, 0, false, false,
+                  parameterNames: [],
+                  parameterTypes: [],
+                  requiredParameterCount: 0,
+                  hasNamedParameters: false,
+                  returnType: 'void');
+              suggestion.element = new protocol.Element(
+                  protocol.ElementKind.FUNCTION, completion,
+                  protocol.Element.makeFlags(),
+                  parameters: '()', returnType: 'void');
+              request.addSuggestion(suggestion);
+            }
           }
         }
       }