interface BlockContentInterface

interface BlockContentInterface extends ContentEntityInterface, EntityChangedInterface, RevisionLogInterface, EntityPublishedInterface, RefinableDependentAccessInterface {
    
    /**
     * Sets the block description.
     *
     * @param string $info
     *   The block description.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setInfo($info);
    
    /**
     * Determines if the block is reusable or not.
     *
     * @return bool
     *   Returns TRUE if reusable and FALSE otherwise.
     */
    public function isReusable();
    
    /**
     * Sets the block to be reusable.
     *
     * @return $this
     */
    public function setReusable();
    
    /**
     * Sets the block to be non-reusable.
     *
     * @return $this
     */
    public function setNonReusable();
    
    /**
     * Sets the theme value.
     *
     * When creating a new block content block from the block library, the user is
     * redirected to the configure form for that block in the given theme. The
     * theme is stored against the block when the block content add form is shown.
     *
     * @param string $theme
     *   The theme name.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setTheme($theme);
    
    /**
     * Gets the theme value.
     *
     * When creating a new block content block from the block library, the user is
     * redirected to the configure form for that block in the given theme. The
     * theme is stored against the block when the block content add form is shown.
     *
     * @return string
     *   The theme name.
     */
    public function getTheme();
    
    /**
     * Gets the configured instances of this custom block.
     *
     * @return array
     *   Array of Drupal\block\Core\Plugin\Entity\Block entities.
     */
    public function getInstances();

}