private CredentialsStore getFolderStore(AbstractFolder f) {
		Iterable<CredentialsStore> stores = CredentialsProvider.lookupStores(f);
		CredentialsStore folderStore = null;
		for (CredentialsStore s : stores) {
			if (s.getProvider() instanceof FolderCredentialsProvider && s.getContext() == f) {
				folderStore = s;
				break;
			}
		}
		return folderStore;
	}
Test the behavior of the {@link WithAWSStep}

@author Allan Burdajewicz
src/test/java/de/taimos/pipeline/aws/WithAWSStepTest.java