title: How can you create new user group in a custom module?
body: <p>I want to assign permissions to a new model for a specific group. This new group will be called "Product Extended User" as it enables access to "Product Extended" model and custom module.</p>
  
  <p>If I do this in <code>ir.mode.access.csv</code> I expect to be enabling access to this group for the specific model.</p>
  
  <pre><code>id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
  access_product_extended_user_group,product.extended.user,model_product_extended,base.group_product_extended_user,1,1,1,1
  </code></pre>
  
  <p>However, the group is not created and hence the XMLID <code>base.group_product_extended_user</code> does not exist, and I doubt it would have to be prefixed with <code>base.</code>.</p>
  
  <p>How can I create such group, not manually but importing it from custom module data file?</p>