String toStringResult = exception.toString();
        assertNotNull(toStringResult);
        assertTrue(toStringResult.contains(PluginException.class.getName()));
        assertTrue(toStringResult.contains(message));
    }

    public void test_toStringMethodWithCause() {
        // Test toString method behavior with cause
        String message = "Plugin error with cause";

        assertNotNull(first);
        assertNotNull(second);
        // Due to round-robin, should get different channels or same order
        assertTrue(Arrays.asList(channel1, channel2).contains(first));
        assertTrue(Arrays.asList(channel1, channel2).contains(second));
    }

    @Test
    void testLeastLoadedStrategy() {
        loadBalancer.setStrategy(LoadBalancingStrategy.LEAST_LOADED);

        println("$commit parents: $parentCommits")
        println(" p1Branches: $p1Branches")
        println(" p2Branches: $p2Branches")
        if (p1Branches.contains("origin/master") && !p2Branches.contains("origin/master") && p2Branches.any { it.startsWith("origin/release") }) {

            assertTrue("Details path should match pattern", htmlNext.getRoutingPath().contains("_details.jsp"));
        }

        if (editField != null) {
            HtmlNext htmlNext = (HtmlNext) editField.get(null);
            assertTrue("Edit path should match pattern", htmlNext.getRoutingPath().contains("_edit.jsp"));
        }
    }

    private Field getFieldIfExists(String fieldName) {

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    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_ENTRY_QUERIES)) {
      result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
    }
    return result;
  }

  static Set<Feature<?>> computeValuesFeatures(Set<Feature<?>> multimapFeatures) {
    Set<Feature<?>> result = computeDerivedCollectionFeatures(multimapFeatures);
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUES)) {

  }

  /**
   * Returns {@code true} if {@code iterable} contains any element {@code o} for which {@code
   * Objects.equals(o, element)} would return {@code true}. Otherwise returns {@code false}, even in
   * cases where {@link Collection#contains} might throw {@link NullPointerException} or {@link
   * ClassCastException}.
   */
  public static boolean contains(Iterable<?> iterable, @Nullable Object element) {

    assertTrue(entrySet.contains(immutableEntry(10, 'X')));
    assertTrue(entrySet.contains(immutableEntry(20, 'X')));
    assertFalse(entrySet.contains(immutableEntry(15, 'X')));
    entrySet = row.tailMap(15).entrySet();
    assertFalse(entrySet.contains(immutableEntry(10, 'X')));
    assertTrue(entrySet.contains(immutableEntry(20, 'X')));
    assertFalse(entrySet.contains(immutableEntry(15, 'X')));
  }

      for (N successorNode : graph.successors(node)) {
        if (subgraph.nodes().contains(successorNode)) {
          subgraph.putEdge(node, successorNode);
        }
      }
    }
    return subgraph;
  }

  /**
   * Returns the subgraph of {@code graph} induced by {@code nodes}. This subgraph is a new graph
   * that contains all of the nodes in {@code nodes}, and all of the {@link Graph#edges() edges}

      for (N successorNode : graph.successors(node)) {
        if (subgraph.nodes().contains(successorNode)) {
          subgraph.putEdge(node, successorNode);
        }
      }
    }
    return subgraph;
  }

  /**
   * Returns the subgraph of {@code graph} induced by {@code nodes}. This subgraph is a new graph
   * that contains all of the nodes in {@code nodes}, and all of the {@link Graph#edges() edges}