Cleanup based on feedback in PR.

include/rive/nested_artboard.hpp

diff --git a/include/rive/nested_artboard.hpp b/include/rive/nested_artboard.hpp
index 1fdc746..1025d7f 100644
--- a/include/rive/nested_artboard.hpp
+++ b/include/rive/nested_artboard.hpp
@@ -3,6 +3,7 @@
 
 #include "rive/generated/nested_artboard_base.hpp"
 #include "rive/hit_info.hpp"
+#include "rive/span.hpp"
 #include <stdio.h>
 
 namespace rive {
@@ -11,8 +12,8 @@
     class NestedArtboard : public NestedArtboardBase {
 
     private:
-        Artboard* m_Artboard = nullptr; // might point to m_Instance, and might not
-        std::unique_ptr<ArtboardInstance> m_Instance;   // may be null
+        Artboard* m_Artboard = nullptr;               // might point to m_Instance, and might not
+        std::unique_ptr<ArtboardInstance> m_Instance; // may be null
         std::vector<NestedAnimation*> m_NestedAnimations;
 
     public:
@@ -31,7 +32,7 @@
         void update(ComponentDirt value) override;
 
         bool hasNestedStateMachines() const;
-        const std::vector<NestedAnimation*>& nestedAnimations() const;
+        Span<NestedAnimation*> nestedAnimations();
 
         /// Convert a world space (relative to the artboard that this
         /// NestedArtboard is a child of) to the local space of the Artboard

src/animation/state_machine_instance.cpp

diff --git a/src/animation/state_machine_instance.cpp b/src/animation/state_machine_instance.cpp
index 7d22aae..662bef0 100644
--- a/src/animation/state_machine_instance.cpp
+++ b/src/animation/state_machine_instance.cpp
@@ -291,11 +291,7 @@
             // Mounted artboard isn't ready or has a 0 scale transform.
             continue;
         }
-        // var nestedPosition = nestedArtboard.worldToLocal(position);
-        // if (nestedPosition == null) {
-        //     // Mounted artboard isn't ready or has a 0 scale transform.
-        //     continue;
-        // }
+
         for (auto nestedAnimation : nestedArtboard->nestedAnimations()) {
             if (nestedAnimation->is<NestedStateMachine>()) {
                 auto nestedStateMachine = nestedAnimation->as<NestedStateMachine>();

src/nested_artboard.cpp

diff --git a/src/nested_artboard.cpp b/src/nested_artboard.cpp
index 0e26962..bbd543d 100644
--- a/src/nested_artboard.cpp
+++ b/src/nested_artboard.cpp
@@ -123,9 +123,7 @@
     return false;
 }
 
-const std::vector<NestedAnimation*>& NestedArtboard::nestedAnimations() const {
-    return m_NestedAnimations;
-}
+Span<NestedAnimation*> NestedArtboard::nestedAnimations() { return toSpan(m_NestedAnimations); }
 
 bool NestedArtboard::worldToLocal(Vec2D world, Vec2D* local) {
     assert(local != nullptr);