void OnSave()
 {
     if (File.Exists(m_savePath))
     {
         UIManager.instance.ShowModal("Save", "A file with that name already exists, do you want to overwrite it?",
                                      new string[] { "Yes", "No" },
                                      (i) => {
             if (i == 0)
             {
                 m_meshManager.Save(m_savePath);
                 gameObject.SetActive(false);
             }
         });
     }
     else
     {
         m_meshManager.Save(m_savePath);
         gameObject.SetActive(false);
     }
 }