title: How can I use the pointy back button for my own buttons/navbar items?
body: <p>As I'm sure you know, navbars inside a navigation controller stack get a back button that shaped sort of like an arrow with a pointy end on the left. I want to use this button image for my own uibuttons and navbar items, but it's missing from from the attribute inspector > bar item > image drop down menu. Where is this graphic located and how can I use it?</p>
  
  <p>here's a screen of the button to which I refer:
  <img src="https://i.stack.imgur.com/6eBb4.png" alt="enter image description here"></p>