code: protected function castValue()
      {
          $value = $this->attributes['meta_value'];
  
          $validTypes = ['boolean', 'integer', 'float', 'double', 'array', 'object', 'null'];
  
          if (in_array($this->attributes['meta_type'], $validTypes)) {
              settype($value, $this->attributes['meta_type']);
          }
  
          return $value;
      }
docs: Cast value to proper type.
  
  @return mixed