Undefined property: $derivativeId

Problem/Motivation

On a site I'm upgrading to D10, I'm seeing lots of these errors for each of the components:

Undefined property: Drupal\layout_builder_kit\Plugin\Block\LBKImage\LBKImage::$derivativeId

Steps to reproduce

• Set version to 2.x
• Upgrade to 10.0

Proposed resolution

These methods aren't needed:

  /**
   * {@inheritdoc}
   */
  public function getPluginDefinition() {
    return $this->pluginDefinition;
  }

  /**
   * {@inheritdoc}
   */
  public function getPluginId() {
    return $this->pluginId;
    }

  /**
   * {@inheritdoc}
   */
  public function getBaseId() {
    return $this->baseId;
  }

  /**
   * {@inheritdoc}
   */
  public function getDerivativeId() {
    return $this->derivativeId;
  }

Also, add the baseId in the LBKBaseComponent and, for completeness, add:

  public function getDerivativeDefinition($derivative_id) {
    // Since this block plugin has no derivatives, we simply return null.
    return null;
  }