app/Census/AbstractCensusColumnCondition.php
private function isDead(Individual $individual): bool
    {
        return $individual->getDeathDate()->isOK() && Date::compare($individual->getDeathDate(), $this->date()) < 0;
    }
private function isDead(Individual $individual): bool
    {
        return $individual->getDeathDate()->isOK() && Date::compare($individual->getDeathDate(), $this->date()) < 0;
    }
private function isDead ( Individual $ individual ) : bool { return $ individual -> getDeathDate ( ) -> isOK ( ) && Date :: compare ( $ individual -> getDeathDate ( ) , $ this -> date ( ) ) < 0 ; }
Is the individual dead.

@param Individual $individual

@return bool
Is the individual dead .