public function post() {
		$json = $this->result->toJson ();
		$this->log->debug ( "AbstractCommand (" . get_class ( $this ) . "): response json: $json" );
		$result = Util::post ( $this->config->slack_webhook_url, $json );
		if (! $result) {
			$this->log->error ( "AbstractCommand: Error sending json: $json to slack hook: " . $this->config->slack_webhook_url );
		}
		return $result;
	}