clarify _validate_searchsorted_value and 2d backing array

pandas-dev · tswast · Jan 21, 2022 · Jan 21, 2022 · Jan 23, 2022 · Jan 24, 2022
commit 8876b9afb0a44a47445d753b2b06f387e026b9d1
diff --git a/doc/source/development/extending.rst b/doc/source/development/extending.rst
@@ -161,6 +161,8 @@ Implement the following:
 
 ``_validate_searchsorted_value``
   Convert a value for use in searching for a value in the backing NumPy array.
+  Note: in most cases, the implementation can be identical to that of
+  ``_validate_setitem_value``.
 
 .. code-block:: python
 
@@ -196,7 +198,7 @@ Implement the following:
 
 
 To support 2D arrays, use the ``_from_backing_data`` helper function when a
-method is called on multi-dimensional data.
+method is called on multi-dimensional data of the same dtype as ``_ndarray``.
 
 .. code-block:: python