Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/AutoFilter/Column.php
public function addRule(Column\Rule $pRule)
    {
        $pRule->setParent($this);
        $this->ruleset[] = $pRule;

        return $this;
    }
public function addRule(Column\Rule $pRule)
    {
        $pRule->setParent($this);
        $this->ruleset[] = $pRule;

        return $this;
    }
Add a new AutoFilter Column Rule to the ruleset.

@param Column\Rule $pRule

@return Column