Hook for overriding the ContextManager and some code clean-up (with more to follow)

pkg/analysis_server/lib/src/get_handler.dart

Index: pkg/analysis_server/lib/src/get_handler.dart
diff --git a/pkg/analysis_server/lib/src/get_handler.dart b/pkg/analysis_server/lib/src/get_handler.dart
index 983f689abcd823e173ed492092bdf239b79149c0..7068b9d9a2e210a8a7d61f3f1fe750d44faaa266 100644
--- a/pkg/analysis_server/lib/src/get_handler.dart
+++ b/pkg/analysis_server/lib/src/get_handler.dart
@@ -1010,8 +1010,7 @@ class GetHandler {
     List<Folder> folders = folderMap.keys.toList();
     folders.sort((Folder first, Folder second) =>
         first.shortName.compareTo(second.shortName));
-    AnalysisOptionsImpl options =
-        analysisServer.contextDirectoryManager.defaultOptions;
+    AnalysisOptionsImpl options = analysisServer.contextManager.defaultOptions;
     ServerOperationQueue operationQueue = analysisServer.operationQueue;
 
     buffer.write('<h3>Analysis Domain</h3>');