title: Laravel chunk skipping 1 record from every chunk
body: <p>So I have weird problem, using Laravel Excel and importing some data. I want to split import by chunks, but every time I define chunk size it skip 1 record from every chunk.</p>
  
  <p>Here is peace of code:</p>
  
  <pre><code>Excel::selectSheets('Sheet1')-&gt;load($tmp_path)-&gt;chunk(3,function($result) use ($product)
  
  foreach ($result as $row ) {
    $row-&gt;dump();
  }
  
  });
  </code></pre>
  
  <p>So I just splitting collection by 3 records to demonstrate problem, screen bellow</p>
  
  <p><a href="https://i.stack.imgur.com/Wy62F.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Wy62F.jpg" alt="enter image description here"></a></p>
  
  <p>Update:</p>
  
  <pre><code>'import'     =&gt; [
    'heading' =&gt; false,
    'startRow' =&gt; 3
  ]
  </code></pre>
  
  <p>So if I define startRow I will see desired number of items per chunk, but unnecessary data at the beginning...</p>
  
  <p><a href="https://i.stack.imgur.com/XhJmi.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XhJmi.jpg" alt="enter image description here"></a></p>