title: FCM: Message to multiple registration ids limit?
body: <p>As per this quote I found:</p>
  
  <blockquote>
    <ul>
    <li><strong>registration_ids</strong> – Type String array – (Optional) [Recipients of a message]
    Multiple registration tokens, min 1 max 1000.</li>
    </ul>
  </blockquote>
  
  <p>Is this the actual limit of device tokens I can send a single message to? And do messages to topics have the same limit?</p>
  
  <p>ex: </p>
  
  <pre><code>{
    "to": [reg_token_01, reg_token_02, ..., reg_token_1000],
    "priority": "high",
    "data": {
      "title": "Hi Peeps!",
      "message": "This is a special message for only for you...  More details are available..."
    }
  }
  </code></pre>
  
  <p>As always, thanks for the info and direction!</p>