title: Less - Defining a class name that conflicts with mixin
body: <p>The problem that I've got is quite simple. I want to use a css class name that has been previously defined as a mixin.</p>
  
  <p>I'm currently using <a href="http://getbootstrap.com/" rel="nofollow">Bootstrap</a>, which has defined a mixin called "placeholder", and because of backwards compatibility we're planning to use the <a href="https://github.com/mathiasbynens/jquery-placeholder" rel="nofollow">jQuery placeholder plugin</a> to support placeholders for IE 9. The problem is that this plugin adds the css class "placeholder" to the DOM element.</p>
  
  <p>How do I define the css class "placeholder" in my LESS file without executing the mixin previously defined in Bootstrap?</p>