title: PrestaShop: How to load custom class (models) of my module
body: <p>Hello i am working on prestrashop its new for and i am trying to develop a module in admin panel i create a model calss sizeguide but when i click on add its showing the error ,</p>
  
  <blockquote>
    <p>Fatal error: Class 'sizeguide' not found in classes\controller\AdminController.php on line 1614</p>
  </blockquote>
  
  <p>i did try to fix it but i am not able to fix it even class is showing in class_index.php like this .</p>
  
  <pre><code>'Sizeguide' =&gt; array (
  'path' =&gt; '',
  'type' =&gt; 'class',
  'override' =&gt; false,
  ),
  
   'SizeguideCore' =&gt; array (
  'path' =&gt; 'classes/Sizeguide.php',
  'type' =&gt; 'class',
  'override' =&gt; false,
  ),
  </code></pre>
  
  <p>please help me to fix this issue thanks in advance.</p>