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

@param  string  $name

@return bool