code: public function fetchFloat(string $key, float $default = 0.0, int $precision = 2): float
      {
          return round(floatval($this->fetch($key, $default)), $precision);
      }
docs: Get parameter value converted to float with precision.
  
  @param string $key
  @param float $default The default value if parameter does not exist
  @param int $precision The optional number of decimal digits to round to
  @return float