docs: @Nonnull
      protected Payload getPayload(final String testName) {
          // Get the current bucket.
          final TestBucket testBucket = buckets.get(testName);
  
          // Lookup Payloads for this test
          if (testBucket != null) {
              final Payload payload = testBucket.getPayload();
              if (null != payload) {
                  return payload;
              }
          }
  
          return Payload.EMPTY_PAYLOAD;
      }