Point from the "Defining Matchers" section in the reference doc to the cookbook, which is much more detailed.

PiperOrigin-RevId: 852639172
Change-Id: Ia39a01702c7c64404950a1be19b1ebdfdff8f010

docs/reference/matchers.md

@@ -1,5 +1,7 @@
 # Matchers Reference
 
+<!-- disableFinding(LINK_RELATIVE_G3DOC) -->
+
 A **matcher** matches a *single* argument. You can use it inside `ON_CALL()` or
 `EXPECT_CALL()`, or use it to validate a value directly using two macros:
 
@@ -297,6 +299,13 @@ which must be a permanent callback.
 
 ## Defining Matchers
 
+{: .callout .note}
+Note: full details about defining new matchers are in the
+[cookbook](../gmock_cook_book.md#NewMatchers). In particular, if `MATCHER`
+macros are not sufficient, you can directly implement
+[monomorphic](../gmock_cook_book.md#MonomorphicMatchers) or
+[polymorphic](../gmock_cook_book.md#PolymorphicMatchers) matchers.
+
 | Macro                                | Description                           |
 | :----------------------------------- | :------------------------------------ |
 | `MATCHER(IsEven, "") { return (arg % 2) == 0; }` | Defines a matcher `IsEven()` to match an even number. |