code: def mul(self, a: int = None, b: int = None) -> 'json':
  		
  		
  		if not a or not b:
  			return dict(message="Pass arguments a and b to multiply them together!")
  		
  		return dict(answer=a * b)
docs: Multiply two values together and return the result via JSON.
  		
  		Python 3 function annotations are used to ensure that the arguments are integers. This requires the
  		functionality of `web.ext.annotation:AnnotationExtension`.
  		
  		There are several ways to execute this method:
  		
  		* POST http://localhost:8080/mul
  		* GET http://localhost:8080/mul?a=27&b=42
  		* GET http://localhost:8080/mul/27/42
  		
  		The latter relies on the fact we can't descend past a callable method so the remaining path elements are
  		used as positional arguments, whereas the others rely on keyword argument assignment from a form-encoded
  		request body or query string arguments.  (Security note: any data in the request body takes presidence over
  		query string arguments!)
  		
  		You can easily test these on the command line using cURL:
  		
  			curl http://localhost:8080/mul/27/42  # HTTP GET
  			
  			curl -d a=27 -d b=42 http://localhost:8080/mul  # HTTP POST