app/Census/AbstractCensusColumn.php
public function father(Individual $individual): ?Individual
    {
        $family = $individual->primaryChildFamily();

        if ($family) {
            return $family->husband();
        }

        return null;
    }
public function father(Individual $individual): ?Individual
    {
        $family = $individual->primaryChildFamily();

        if ($family) {
            return $family->husband();
        }

        return null;
    }
public function father ( Individual $ individual ) : ? Individual { $ family = $ individual -> primaryChildFamily ( ) ; if ( $ family ) { return $ family -> husband ( ) ; } return null ; }
Find the father of an individual

@param Individual $individual

@return Individual|null
Find the father of an individual