Doctrine\ODM\OrientDB\Caster\Caster::castFloat PHP Method

    public function castFloat()
    {
        $castFunction = function ($value) {
            return (double) $value;
        };
        if (is_numeric($this->value)) {
            return $castFunction($this->value);
        }
        return $this->handleMismatch($castFunction, 'double');
    }