public function buffer($key, $withLayout, $value = null)
{
$name = $this->getName();
// If no value is defined, assume it resides in the config
if (is_null($value)) {
$value = Helper::getConfigKey($name, $key);
}
if (is_null($value)) {
throw new \InvalidArgumentException("Cannot buffer an empty value.");
}
// If a layout is present, add the value to it's buffer instead
$name = $withLayout ? $this->getLayout() : $this->getName();
Helper::setBufferKey($name, $key, $value);
}
