title: How can I execute a call to the current process in a GenServer?
body: <p>I know I can call a GenServer like this</p>
  
  <pre><code>GenServer.call(pid, request)
  # using a pid
  </code></pre>
  
  <p>or like this</p>
  
  <pre><code>GenServer.call(registered_name, request)
  # if I registered the process with a name
  </code></pre>
  
  <p>But is there a way to excute the <code>GenServer.call</code> inside the module without knowing the pid/registered name?(ie is there something like <code>GenServer.call(__CURRENT_PROCESS__, request)</code>?)</p>