docs: def log_start_end(f):
      """
      Decorator to log start and end of function
  
      Use of decorator module here ensures that argspec will inspect wrapped
      function, not the decorator itself.
      http://micheles.googlecode.com/hg/decorator/documentation.html
      """
      def inner(f, *args, **kwargs):
          logging.info('Starting %s' % f.__name__)
          res = f(*args, **kwargs)
          logging.info('Finished %s' % f.__name__)
          return res
      return decorator.decorator(inner, f)