ModelProject/Library/PackageCache/com.unity.2d.animation@5.1.1/Editor/Assets/SkinningModule/VisibilityToolbar.uxml

<?xml version="1.0" encoding="utf-8"?>
<UXML xmlns:ui="UnityEngine.UIElements" xmlns:aui="UnityEditor.U2D.Animation">
  <aui:Toolbar name="VisibilityToolbar">
    <ui:Button name="VisibilityToolButton" tooltip="Visibility Tool">
      <ui:Image name="HierarchyToolButtonImage" />
    </ui:Button>
  </aui:Toolbar>
</UXML>