From 7fc9564e5e23aaed7e23941523c2c03cf2cdacc0 Mon Sep 17 00:00:00 2001
From: Kevin Schaaf <kschaaf@google.com>
Date: Wed, 20 Jun 2018 17:58:51 -0700
Subject: [PATCH] Update types.

---
 types/lib/legacy/class.d.ts             |  2 +-
 types/lib/legacy/legacy-data-mixin.d.ts | 27 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 types/lib/legacy/legacy-data-mixin.d.ts

diff --git a/types/lib/legacy/class.d.ts b/types/lib/legacy/class.d.ts
index df52a92a2b..973b1d01ba 100644
--- a/types/lib/legacy/class.d.ts
+++ b/types/lib/legacy/class.d.ts
@@ -91,7 +91,7 @@ declare namespace Polymer {
    *
    * @returns Generated class
    */
-  function Class(info: PolymerInit): {new(): HTMLElement};
+  function Class<T>(info: PolymerInit, mixin: (p0: T) => T): {new(): HTMLElement};
 }
 
 declare class PolymerGenerated {
diff --git a/types/lib/legacy/legacy-data-mixin.d.ts b/types/lib/legacy/legacy-data-mixin.d.ts
new file mode 100644
index 0000000000..372b9b0420
--- /dev/null
+++ b/types/lib/legacy/legacy-data-mixin.d.ts
@@ -0,0 +1,27 @@
+/**
+ * DO NOT EDIT
+ *
+ * This file was automatically generated by
+ *   https://github.com/Polymer/gen-typescript-declarations
+ *
+ * To modify these typings, edit the source file(s):
+ *   lib/legacy/legacy-data-mixin.html
+ */
+
+/// <reference path="../utils/mixin.d.ts" />
+
+declare class UndefinedArgumentError {
+}
+
+declare class LegacyDataMixin {
+
+  /**
+   * Overrides `Polyer.PropertyEffects` to wrap effect functions to
+   * catch `UndefinedArgumentError`s and warn.
+   *
+   * @param property Property that should trigger the effect
+   * @param type Effect type, from this.PROPERTY_EFFECT_TYPES
+   * @param effect Effect metadata object
+   */
+  _addPropertyEffect(property: string, type: string, effect?: object|null): void;
+}