/**
* Add column filtering conditions to collection
*
* @param \Magento\Backend\Block\Widget\Grid\Column $column
* @return $this
*/
protected function _addColumnFilterToCollection($column)
{
if ($this->getCollection()) {
$field = $column->getFilterIndex() ? $column->getFilterIndex() : $column->getIndex();
if ($column->getFilterConditionCallback()) {
call_user_func($column->getFilterConditionCallback(), $this->getCollection(), $column);
} else {
$condition = $column->getFilter()->getCondition();
if ($field && isset($condition)) {
$this->getCollection()->addFieldToFilter($field, $condition);
}
}
}
return $this;
}