title: how to skip first n element from collection?
body: <p>I want to skip, some element from collection </p>
  
  <pre><code>$post_one = Post_one::all();
  $post_two = Post_two::all();
  $posts = collect();
  if($post_one){
      foreach($post_one as $post){
          $posts-&gt;push($post);
      }
  }
  if($post_two){
      foreach($post_two as $post){
         $posts-&gt;push($post);
      }
  }
  //now i want to skip n=3, element form the collection of posts
  $posts = $posts-&gt;sortBy('created_at')-&lt;skip(3)-&gt;take(3);//does not work 
  </code></pre>
  
  <p>error::Method skip does not exist.</p>