Improve Navigator documentation (#29540)
diff --git a/packages/flutter/lib/src/widgets/navigator.dart b/packages/flutter/lib/src/widgets/navigator.dart
index 0564c3c..edf913e 100644
--- a/packages/flutter/lib/src/widgets/navigator.dart
+++ b/packages/flutter/lib/src/widgets/navigator.dart
@@ -564,7 +564,7 @@
///
/// The page route is built in two parts, the "page" and the
/// "transitions". The page becomes a descendant of the child passed to
-/// the `buildTransitions` method. Typically the page is only built once,
+/// the `transitionsBuilder` function. Typically the page is only built once,
/// because it doesn't depend on its animation parameters (elided with `_`
/// and `__` in this example). The transition is built on every frame
/// for its duration.
