title: How make select2 placeholder for search input
body: <p>How to make placeholder for select2 jQuery plugin. On StackOverflow many answers how to make placeholder there, but they about element's placeholder. I need to specify a placeholder for the search box, see pic.<a href="https://i.stack.imgur.com/lGXnk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lGXnk.png" alt="enter image description here"></a></p>