add doc comment, and fix typo

egui_node_graph/src/traits.rs

@@ -5,6 +5,10 @@ use super::*;
 /// types of the node graph.
 pub trait WidgetValueTrait {
     type Response;
+    /// This method will be called for each input parameter with a widget. The
+    /// return value is a vector of custom response objects which can be used
+    /// to implement handling of side effects. If unsure, the response Vec can
+    /// be empty.
     fn value_widget(&mut self, param_name: &str, ui: &mut egui::Ui) -> Vec<Self::Response>;
 }
 

egui_node_graph_example/src/app.rs

@@ -271,7 +271,7 @@ impl WidgetValueTrait for MyValueType {
                 });
             }
         }
-        // This allows you to retorn your responses from the inline widgets.
+        // This allows you to return your responses from the inline widgets.
         Vec::new()
     }
 }