Improve DebugCreator docs (#74341)

packages/flutter/lib/src/rendering/object.dart

@@ -1305,6 +1305,10 @@ abstract class RenderObject extends AbstractNode with DiagnosticableTreeMixin im
   /// The object responsible for creating this render object.
   ///
   /// Used in debug messages.
+  ///
+  /// See also:
+  ///
+  ///  * [DebugCreator], which the [widgets] library uses as values for this field.
   Object? debugCreator;
 
   void _debugReportException(String method, Object exception, StackTrace stack) {

packages/flutter/lib/src/widgets/framework.dart

@@ -6239,8 +6239,8 @@ class MultiChildRenderObjectElement extends RenderObjectElement {
 
 /// A wrapper class for the [Element] that is the creator of a [RenderObject].
 ///
-/// Attaching a [DebugCreator] attach the [RenderObject] will lead to better error
-/// message.
+/// Setting a [DebugCreator] as [RenderObject.debugCreator] will lead to better
+/// error messages.
 class DebugCreator {
   /// Create a [DebugCreator] instance with input [Element].
   DebugCreator(this.element);