diff --git a/altair/vegalite/v5/_api_rfc.py b/altair/vegalite/v5/_api_rfc.py
index 5d4b5f438..cad6af094 100644
--- a/altair/vegalite/v5/_api_rfc.py
+++ b/altair/vegalite/v5/_api_rfc.py
@@ -385,34 +385,34 @@ def __init__(self, arg: Map, /) -> None:
 
     def angle(self, *args: Any, **kwds: Any) -> channels.Angle: ...
     def color(self, *args: Any, **kwds: Any) -> channels.Color: ...
-    def column(self, *args: Any, **kwds: Any) -> Any: ...
-    def description(self, *args: Any, **kwds: Any) -> Any: ...
-    def detail(self, *args: Any, **kwds: Any) -> Any: ...
-    def facet(self, *args: Any, **kwds: Any) -> Any: ...
-    def fill(self, *args: Any, **kwds: Any) -> Any: ...
-    def fill_opacity(self, *args: Any, **kwds: Any) -> Any: ...
-    def href(self, *args: Any, **kwds: Any) -> Any: ...
-    def key(self, *args: Any, **kwds: Any) -> Any: ...
-    def latitude(self, *args: Any, **kwds: Any) -> Any: ...
-    def latitude2(self, *args: Any, **kwds: Any) -> Any: ...
-    def longitude(self, *args: Any, **kwds: Any) -> Any: ...
-    def longitude2(self, *args: Any, **kwds: Any) -> Any: ...
-    def opacity(self, *args: Any, **kwds: Any) -> Any: ...
-    def order(self, *args: Any, **kwds: Any) -> Any: ...
-    def radius(self, *args: Any, **kwds: Any) -> Any: ...
-    def radius2(self, *args: Any, **kwds: Any) -> Any: ...
-    def row(self, *args: Any, **kwds: Any) -> Any: ...
-    def shape(self, *args: Any, **kwds: Any) -> Any: ...
-    def size(self, *args: Any, **kwds: Any) -> Any: ...
-    def stroke(self, *args: Any, **kwds: Any) -> Any: ...
-    def stroke_dash(self, *args: Any, **kwds: Any) -> Any: ...
-    def stroke_opacity(self, *args: Any, **kwds: Any) -> Any: ...
-    def stroke_width(self, *args: Any, **kwds: Any) -> Any: ...
-    def text(self, *args: Any, **kwds: Any) -> Any: ...
-    def theta(self, *args: Any, **kwds: Any) -> Any: ...
-    def theta2(self, *args: Any, **kwds: Any) -> Any: ...
-    def tooltip(self, *args: Any, **kwds: Any) -> Any: ...
-    def url(self, *args: Any, **kwds: Any) -> Any: ...
+    def column(self, *args: Any, **kwds: Any) -> channels.Column: ...
+    def description(self, *args: Any, **kwds: Any) -> channels.Description: ...
+    def detail(self, *args: Any, **kwds: Any) -> channels.Detail: ...
+    def facet(self, *args: Any, **kwds: Any) -> channels.Facet: ...
+    def fill(self, *args: Any, **kwds: Any) -> channels.Fill: ...
+    def fill_opacity(self, *args: Any, **kwds: Any) -> channels.FillOpacity: ...
+    def href(self, *args: Any, **kwds: Any) -> channels.Href: ...
+    def key(self, *args: Any, **kwds: Any) -> channels.Key: ...
+    def latitude(self, *args: Any, **kwds: Any) -> channels.Latitude: ...
+    def latitude2(self, *args: Any, **kwds: Any) -> channels.Latitude2: ...
+    def longitude(self, *args: Any, **kwds: Any) -> channels.Longitude: ...
+    def longitude2(self, *args: Any, **kwds: Any) -> channels.Longitude2: ...
+    def opacity(self, *args: Any, **kwds: Any) -> channels.Opacity: ...
+    def order(self, *args: Any, **kwds: Any) -> channels.Order: ...
+    def radius(self, *args: Any, **kwds: Any) -> channels.Radius: ...
+    def radius2(self, *args: Any, **kwds: Any) -> channels.Radius2: ...
+    def row(self, *args: Any, **kwds: Any) -> channels.Row: ...
+    def shape(self, *args: Any, **kwds: Any) -> channels.Shape: ...
+    def size(self, *args: Any, **kwds: Any) -> channels.Size: ...
+    def stroke(self, *args: Any, **kwds: Any) -> channels.Stroke: ...
+    def stroke_dash(self, *args: Any, **kwds: Any) -> channels.StrokeDash: ...
+    def stroke_opacity(self, *args: Any, **kwds: Any) -> channels.StrokeOpacity: ...
+    def stroke_width(self, *args: Any, **kwds: Any) -> channels.StrokeWidth: ...
+    def text(self, *args: Any, **kwds: Any) -> channels.Text: ...
+    def theta(self, *args: Any, **kwds: Any) -> channels.Theta: ...
+    def theta2(self, *args: Any, **kwds: Any) -> channels.Theta2: ...
+    def tooltip(self, *args: Any, **kwds: Any) -> channels.Tooltip: ...
+    def url(self, *args: Any, **kwds: Any) -> channels.Url: ...
     def x(self, *args: Any, **kwds: Any) -> channels.X:
         return channels.X(*args, **self._arg, **kwds)