Mostly use entities in use.dart

pkg/compiler/lib/src/elements/entities.dart

Index: pkg/compiler/lib/src/elements/entities.dart
diff --git a/pkg/compiler/lib/src/elements/entities.dart b/pkg/compiler/lib/src/elements/entities.dart
index df0abbe37eb1c723941476ed1d35872388cf6843..6fd1f50d543fdc1536a855a9c13e99f0dc90f79f 100644
--- a/pkg/compiler/lib/src/elements/entities.dart
+++ b/pkg/compiler/lib/src/elements/entities.dart
@@ -33,6 +33,9 @@ abstract class TypeVariableEntity extends Entity {
 /// Currently only [MemberElement] but later also kernel based Dart members
 /// and/or Dart-in-JS properties.
 abstract class MemberEntity extends Entity {
+  bool get isTopLevel;
+  bool get isStatic;
+  bool get isInstanceMember;
   bool get isConstructor;
   bool get isField;
   bool get isFunction;