/**
* returns the chart meta data
*/
public function getMetadata($key = null)
{
$default = Chart::defaultMetaData();
$meta = json_decode(parent::getMetadata(), true);
if (!is_array($meta)) {
$meta = array();
}
$meta = array_merge_recursive_simple($default, $meta);
if (empty($key)) {
return $meta;
}
$keys = explode('.', $key);
$p = $meta;
foreach ($keys as $key) {
$p = $p[$key];
}
return $p;
}
