How do I set the field by which the gridfield is sorted?
I tried the following but it oesn't work even though it's recognised as setting the fieldsorting in GridFieldSortableHeader.
$gf_config = GridFieldConfig::create()->addComponents(
new GridFieldToolbarHeader(),
new GridFieldSortableHeader(),
new GridFieldAddNewButton('toolbar-header-right'),
new GridFieldDataColumns(),
new GridFieldEditButton(),
new GridFieldDeleteAction(),
new GridFieldDetailForm()
);
$gridfield = new GridField("Steps", "Steps:", $this->Steps(), $gf_config);
$sortable = $gridfield->getConfig()->getComponentByType('GridFieldSortableHeader');
$sortable->setFieldSorting('Title');