Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/StringState.java |
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/StringState.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/StringState.java |
index 6358f0072bff1bf15c4cef21b80fc25885b37a3e..02c3750410a8b6efa454cf215c74585dc65e02be 100644 |
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/StringState.java |
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/StringState.java |
@@ -111,6 +111,11 @@ public class StringState extends InstanceState { |
} |
@Override |
+ public boolean isUnknown() { |
+ return value == null; |
+ } |
+ |
+ @Override |
public String toString() { |
return value == null ? "-unknown-" : "'" + value + "'"; |
} |