List<Exception> errors = resolutionErrors.get(dependency);
        return (errors != null) ? Collections.unmodifiableList(errors) : Collections.emptyList();
    }

    public void setResolutionErrors(Dependency dependency, List<Exception> errors) {
        dependencies.add(dependency);
        unresolvedDependencies.add(dependency);
        resolutionErrors.put(dependency, errors);
    }

            DependencyNode node = ar.getRequest().getDependencyNode();
            if (ar.isResolved()) {
                result.addResolvedDependency(node.getDependency());
            } else {
                result.setResolutionErrors(node.getDependency(), ar.getExceptions());
            }
        }
    }