src/FormBuilder.php
private function missingOldAndModel($name)
    {
        return is_null($this->old($name))
            && is_null($this->getModelValueAttribute($name));
    }
private function missingOldAndModel($name)
    {
        return is_null($this->old($name))
            && is_null($this->getModelValueAttribute($name));
    }
Determine if old input or model input exists for a key.

@param  string  $name

@return bool