title: raise an exception in jinja if we passed in a variable that is not present in the template
body: <p>Is there a method for jinja2 to raise an exception when we pass a variable that is not present in the template?</p>
  
  <p>PS: This is different(or opposite) from raising an exception when a variable is present in the template but it is not passed. For this I use "undefined=StrictUndefined" </p>