src/SleepingOwl/Admin/Columns/Column/BaseColumn.php
protected function getAttributesForHeader()
	{
		$attributes = [];
		if ( ! $this->isSortable())
		{
			$attributes['data-sortable'] = 'false';
		}
		if ($this->isSortableDefault())
		{
			$attributes['data-sortable-default'] = $this->sortableDest;
		}
		$attributes['style'] = 'width:10px;';
		return $attributes;
	}
protected function getAttributesForHeader()
	{
		$attributes = [];
		if ( ! $this->isSortable())
		{
			$attributes['data-sortable'] = 'false';
		}
		if ($this->isSortableDefault())
		{
			$attributes['data-sortable-default'] = $this->sortableDest;
		}
		$attributes['style'] = 'width:10px;';
		return $attributes;
	}
Get attributes for column header tag

@return array