denyOverwrite example

        return $this->validation()->rule();
    }

    /** * Sets whether the node can be overwritten. * * @return $this */
    public function cannotBeOverwritten(bool $deny = true): static
    {
        $this->merge()->denyOverwrite($deny);

        return $this;
    }

    /** * Gets the builder for validation rules. */
    protected function validation(): ValidationBuilder
    {
        return $this->validation ??= new ValidationBuilder($this);
    }