Webmozart\Assert\Assert::float PHP 메소드

    public static function float($value, $message = '')
    {
        if (!is_float($value)) {
            static::reportInvalidArgument(sprintf($message ?: 'Expected a float. Got: %s', static::typeToString($value)));
        }
    }

 /**
  * {@inheritdoc}
  *
  * @throws \InvalidArgumentException
  */
 public function setRatio($ratio)
 {
     Assert::float($ratio);
     $this->ratio = $ratio;
 }