title: Wait for complete deletion of a DynamoDB table using boto3
body: <p>I need to delete a dynamodb table, and wait until it is completely removed. How can I check this?<br>
  boto3 api expose a method <code>get_waiter</code> to wait for certain events, but it is not well documented. Can I use it for this purpose? Which would be the event name, or maybe handle a ResourceNotFoundException</p>
  
  <pre><code># Wait until the table exists.
  table.meta.client.get_waiter('table_exists').wait(TableName='TableName')
  </code></pre>