<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def send_mail(self, subject, to, template, **template_ctx):
 """ Utility method to send mail with the `mail` template context. """

        if not self.mail:
            from warnings import warn
            warn('Attempting to send mail without the mail bundle installed! '
                 'Please install it, or fix your configuration.')
            return

        self.mail.send(subject, to, template, **dict(
            **self.security.run_ctx_processor('mail'),
            **template_ctx))