listBranch and listBranches methods

src/Api.php

@@ -107,4 +107,24 @@ class Api {
     $this->init();
     return $this->client->jobs()->show($project_id, $job_id);
   }
+
+  /**
+   * @param int|string $project_id
+   *
+   * @return mixed
+   */
+  public function listBranches($project_id): array {
+    $this->init();
+    return $this->client->repositories->branches($project_id);
+  }
+
+  /**
+   * @param int|string $project_id
+   * @param string $branch
+   * @return mixed
+   */
+  public function listBranch($project_id, string $branch): array {
+    $this->init();
+    return $this->client->repositories->branch($project_id);
+  }
 }