public function sendReminder($method = null)
    {
        if ($method) {
            if (!in_array($method, array('Email', 'Letter')))
                throw new InvalidFieldValueError("'method' must be either " .
                    "'Email' or 'Letter'");

            return $this->performEvent('remind', array('method' => $method));
        }

        return $this->performEvent('remind');
    }
public function sendReminder($method = null)
    {
        if ($method) {
            if (!in_array($method, array('Email', 'Letter')))
                throw new InvalidFieldValueError("'method' must be either " .
                    "'Email' or 'Letter'");

            return $this->performEvent('remind', array('method' => $method));
        }

        return $this->performEvent('remind');
    }
public function sendReminder ( $ method = null ) { if ( $ method ) { if ( ! in_array ( $ method , array ( 'Email' , 'Letter' ) ) ) throw new InvalidFieldValueError ( "'method' must be either " . "'Email' or 'Letter'" ) ; return $ this -> performEvent ( 'remind' , array ( 'method' => $ method ) ) ; } return $ this -> performEvent ( 'remind' ) ; }
Manually send a reminder if the billogram is overdue.

@param null $method
@return $this
@throws \Billogram\Api\Exceptions\InvalidFieldValueError
Manually send a reminder if the billogram is overdue .