docs: def notify(self, noteType, title, description, icon=None, sticky=False,
  			priority=None, callback=None, identifier=None, custom={}):
  		"""Send a GNTP notifications
  
  		.. warning::
  			Must have registered with growl beforehand or messages will be ignored
  
  		:param string noteType: One of the notification names registered earlier
  		:param string title: Notification title (usually displayed on the notification)
  		:param string description: The main content of the notification
  		:param string icon: Icon URL path
  		:param boolean sticky: Sticky notification
  		:param integer priority: Message priority level from -2 to 2
  		:param string callback:  URL callback
  		:param dict custom: Custom attributes. Key names should be prefixed with X-
  			according to the spec but this is not enforced by this class
  
  		.. warning::
  			For now, only URL callbacks are supported. In the future, the
  			callback argument will also support a function
  		"""
  		logger.info('Sending notification [%s] to %s:%s', noteType, self.hostname, self.port)
  		assert noteType in self.notifications
  		notice = gntp.core.GNTPNotice()
  		notice.add_header('Application-Name', self.applicationName)
  		notice.add_header('Notification-Name', noteType)
  		notice.add_header('Notification-Title', title)
  		if self.password:
  			notice.set_password(self.password, self.passwordHash)
  		if sticky:
  			notice.add_header('Notification-Sticky', sticky)
  		if priority:
  			notice.add_header('Notification-Priority', priority)
  		if icon:
  			if self._checkIcon(icon):
  				notice.add_header('Notification-Icon', icon)
  			else:
  				resource = notice.add_resource(icon)
  				notice.add_header('Notification-Icon', resource)
  
  		if description:
  			notice.add_header('Notification-Text', description)
  		if callback:
  			notice.add_header('Notification-Callback-Target', callback)
  		if identifier:
  			notice.add_header('Notification-Coalescing-ID', identifier)
  
  		for key in custom:
  			notice.add_header(key, custom[key])
  
  		self.add_origin_info(notice)
  		self.notify_hook(notice)
  
  		return self._send('notify', notice)