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pkg/analyzer/lib/source/sdk_ext.dart

Index: pkg/analyzer/lib/source/sdk_ext.dart
diff --git a/pkg/analyzer/lib/source/sdk_ext.dart b/pkg/analyzer/lib/source/sdk_ext.dart
index f4bcdb97007b7b9258c221ec229decd1e00dce78..3e833dfaa3f59fc67cef426b30a0552c5da45cbe 100644
--- a/pkg/analyzer/lib/source/sdk_ext.dart
+++ b/pkg/analyzer/lib/source/sdk_ext.dart
@@ -43,6 +43,13 @@ class SdkExtUriResolver extends UriResolver {
   /// Number of sdk extensions.
   int get length => _urlMappings.length;
 
+  /**
+   * Return a table mapping the names of extensions to the paths where those
+   * extensions can be found.
+   */
+  Map<String, String> get urlMappings =>
+      new Map<String, String>.from(_urlMappings);
+
   /// Return the path mapping for [libName] or null if there is none.
   String operator [](String libName) => _urlMappings[libName];