title: what is "self.class.include?" means here?
body: <pre><code>if self.class.include?(Msf::Payload::Single) and
    self.class.include?(Msf::Payload::Stager)
    self.module_info['Stage'] = {}
  </code></pre>
  
  <p>I tried to execute "puts self.class" output was "Object". Thanks in advance.</p>