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

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

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

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

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

@param Individual $individual

@return Individual|null
Find the mother of an individual