src/Debug/MethodClear.php
private function clearAlerts($flags)
    {
        $clearAlerts = $flags & Debug::CLEAR_ALERTS;
        if (!$clearAlerts) {
            return null;
        }
        if ($this->channelName) {
            foreach ($this->data['alerts'] as $i => $entry) {
                $channel = isset($entry[2]['channel']) ? $entry[2]['channel'] : null;
                if ($this->channelTest($channel)) {
                    unset($this->data['alerts'][$i]);
                }
            }
            $this->data['alerts'] = \array_values($this->data['alerts']);
        } else {
            $this->data['alerts'] = array();
        }
        return 'alerts';
    }
private function clearAlerts($flags)
    {
        $clearAlerts = $flags & Debug::CLEAR_ALERTS;
        if (!$clearAlerts) {
            return null;
        }
        if ($this->channelName) {
            foreach ($this->data['alerts'] as $i => $entry) {
                $channel = isset($entry[2]['channel']) ? $entry[2]['channel'] : null;
                if ($this->channelTest($channel)) {
                    unset($this->data['alerts'][$i]);
                }
            }
            $this->data['alerts'] = \array_values($this->data['alerts']);
        } else {
            $this->data['alerts'] = array();
        }
        return 'alerts';
    }
Clear alerts

@param integer $flags flags passed to clear()

@return string|null