Issue #3489729: Make recipes re-applyable

Closes #3489729

src/Activator/InstructionsInterface.php

@@ -20,6 +20,9 @@ interface InstructionsInterface extends ActivatorInterface {
    *
    * @param \Drupal\project_browser\ProjectBrowser\Project $project
    *   The project to activate.
+   * @param string|null $source_id
+   *   (optional) The ID of the source plugin that exposed the project, if
+   *   known. Defaults to NULL.
    *
    * @return string
    *   One of:
@@ -29,6 +32,6 @@ interface InstructionsInterface extends ActivatorInterface {
    *   - An absolute URL which this project's "Install" button should link to in
    *     the UI.
    */
-  public function getInstructions(Project $project): string;
+  public function getInstructions(Project $project, ?string $source_id = NULL): string;
 
 }