Use separate relation kinds for qualified usages.

pkg/analyzer/lib/src/summary/format.dart

Index: pkg/analyzer/lib/src/summary/format.dart
diff --git a/pkg/analyzer/lib/src/summary/format.dart b/pkg/analyzer/lib/src/summary/format.dart
index a337fc4130abca1cfae507a12dc66dbc8017c2d3..946a6eb2776ba055903561b73686aa88e9b96fc9 100644
--- a/pkg/analyzer/lib/src/summary/format.dart
+++ b/pkg/analyzer/lib/src/summary/format.dart
@@ -11,29 +11,29 @@ import 'flat_buffers.dart' as fb;
 import 'idl.dart' as idl;
 import 'dart:convert' as convert;
 
-class _IndexSyntheticElementKindReader extends fb.Reader<idl.IndexSyntheticElementKind> {
-  const _IndexSyntheticElementKindReader() : super();
+class _IndexRelationKindReader extends fb.Reader<idl.IndexRelationKind> {
+  const _IndexRelationKindReader() : super();
 
   @override
   int get size => 1;
 
   @override
-  idl.IndexSyntheticElementKind read(fb.BufferPointer bp) {
+  idl.IndexRelationKind read(fb.BufferPointer bp) {
     int index = const fb.Uint8Reader().read(bp);
-    return idl.IndexSyntheticElementKind.values[index];
+    return idl.IndexRelationKind.values[index];
   }
 }
 
-class _IndexRelationKindReader extends fb.Reader<idl.IndexRelationKind> {
-  const _IndexRelationKindReader() : super();
+class _IndexSyntheticElementKindReader extends fb.Reader<idl.IndexSyntheticElementKind> {
+  const _IndexSyntheticElementKindReader() : super();
 
   @override
   int get size => 1;
 
   @override
-  idl.IndexRelationKind read(fb.BufferPointer bp) {
+  idl.IndexSyntheticElementKind read(fb.BufferPointer bp) {
     int index = const fb.Uint8Reader().read(bp);
-    return idl.IndexRelationKind.values[index];
+    return idl.IndexSyntheticElementKind.values[index];
   }
 }