does this work nicely?

Jenkinsfile

@@ -1,8 +1,7 @@
 def retryWithDelay(int maxRetries, int delay, Closure body) {
   for (int i = 0; i < maxRetries; i++) {
     try {
-      body()
-      return
+      return body()
     } catch (Exception e) {
       sleep(delay)
     }
@@ -102,10 +101,8 @@ def pcStage(String stageName, Closure body) {
 
     def dockerArgs = "--user=batman -v /tmp/comma_download_cache:/tmp/comma_download_cache -v /tmp/scons_cache:/tmp/scons_cache -e PYTHONPATH=${env.WORKSPACE}";
 
-    def openpilot_base = null;
-
-    retryWithDelay (3, 15) {
-      openpilot_base = docker.build("openpilot-base:build-${env.GIT_COMMIT}", "-f Dockerfile.openpilot_base .")
+    def openpilot_base = retryWithDelay (3, 15) {
+      return docker.build("openpilot-base:build-${env.GIT_COMMIT}", "-f Dockerfile.openpilot_base .")
     }
     
     openpilot_base.inside(dockerArgs) {