title: Are PermissionsMixin and PermissionRequiredMixin the same?
body: <p>I want to know if <code>PermissionsMixin</code> has the same function as <code>PermissionRequiredMixin</code>.</p>
  <pre><code>from django.contrib.auth.models import PermissionMixin
  from django.contrib.auth.mixins import PermissionRequiredMixin
  </code></pre>