Gets style groups label.
array Collection of style groups labels.
Overrides StyleDiscoveryInterface::getStyleGroupsLabel
public function getStyleGroupsLabel() {
$groups = $this
->getStyleGroups();
$group_options = [];
foreach ($groups as $group_id => $group) {
$group_options[$group_id] = $group['label'];
}
return $group_options;
}