assert it instanceof UnresolvedDependencyResult
                        assert it.requested.toString() == 'org:leaf:(,1.0)'
                        assert it.failure.getMessage().startsWith('Could not find any version that matches org:leaf:(,1.0).')
                    }
                    b.dependencies.each {
                        assert it instanceof ResolvedDependencyResult

      } catch (Exception | StackOverflowError e) {
        // Any Exception is either a RuntimeException or sneaky checked exception.
        //
        // Don't call getMessage or toString() on the exception, in case the exception thrown by the
        // subclass is implemented with bugs similar to the subclass.
        pendingDescription = "Exception thrown from implementation: " + e.getClass();

      } catch (Exception | StackOverflowError e) {
        // Any Exception is either a RuntimeException or sneaky checked exception.
        //
        // Don't call getMessage or toString() on the exception, in case the exception thrown by the
        // subclass is implemented with bugs similar to the subclass.
        pendingDescription = "Exception thrown from implementation: " + e.getClass();

      Map<Integer, String> unused =
          Maps.uniqueIndex(ImmutableSet.of("one", "uno"), Functions.constant(1));
      fail();
    } catch (IllegalArgumentException expected) {
      assertThat(expected.getMessage()).contains("Multimaps.index");
    }
  }

  /** Null values are not allowed. */
  public void testUniqueIndexNullValue() {
    List<@Nullable String> listWithNull = Lists.newArrayList((String) null);

                            final DocWriteRequest<?> req = requests.get(i);
                            final Failure failure = resp.getFailure();
                            logger.debug("Failed Request: {}\n=>{}", req, failure.getMessage());
                        }
                    }
                }
            }
            throw new SearchEngineClientException(response.buildFailureMessage());
        }