findAllReferences: In export default foo, symbol name is foo

src/compiler/utilities.ts

@@ -4032,6 +4032,10 @@ namespace ts {
         return node.kind === SyntaxKind.ExportSpecifier;
     }
 
+    export function isExportAssignment(node: Node): node is ExportAssignment {
+        return node.kind === SyntaxKind.ExportAssignment;
+    }
+
     export function isModuleOrEnumDeclaration(node: Node): node is ModuleDeclaration | EnumDeclaration {
         return node.kind === SyntaxKind.ModuleDeclaration || node.kind === SyntaxKind.EnumDeclaration;
     }