values = Stream.<T>concat(
                            Stream.of(builtinValues), providers.stream().flatMap(p -> p.provides().stream()))
                    .collect(Collectors.toMap(t -> t.id(), t -> t));
        }

        @Override
        public Optional<T> lookup(String id) {
            return Optional.ofNullable(values.get(id));
        }
    }

                        .filter(Objects::nonNull)
                        .map(Node::getDependency)
                        .filter(Objects::nonNull)
                        .collect(Collectors.toMap(d -> d.getGroupId() + ":" + d.getArtifactId(), d -> d)));
            }
        };
    }

    @Override
    public PluginExecution getModel() {
        return delegate.getPlugin().getExecutions().stream()

import org.codehaus.plexus.classworlds.realm.ClassRealm;

import static java.util.function.Function.identity;
import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toMap;

/**
 * Provides information about artifacts (identified by groupId:artifactId string key) and classpath elements exported by
 * Maven core itself and loaded Maven core extensions.
 *
 * @since 3.3.0
 */

      BinaryOperator<V> mergeFunction) {
    checkNotNull(keyFunction);
    checkNotNull(valueFunction);
    checkNotNull(mergeFunction);
    return collectingAndThen(
        Collectors.toMap(keyFunction, valueFunction, mergeFunction, LinkedHashMap::new),
        ImmutableMap::copyOf);
  }

  static <T extends @Nullable Object, K, V>
      Collector<T, ?, ImmutableSortedMap<K, V>> toImmutableSortedMap(

        return map != null ? Collections.unmodifiableMap(map) : Collections.emptyMap();
    }

    private static Map<String, String> toMap(Properties properties) {
        if (properties != null && !properties.isEmpty()) {
            return properties.entrySet().stream()
                    .collect(Collectors.toMap(e -> String.valueOf(e.getKey()), e -> String.valueOf(e.getValue())));

        } else {
            return null;
        }

                                        || b.getOriginalKey().getQualifier() == null
                                        || b.getOriginalKey().getQualifier() instanceof String)
                                .collect(Collectors.toMap(
                                        b -> (String)
                                                (b.getOriginalKey() != null
                                                        ? b.getOriginalKey().getQualifier()

    }

    private static Map<AccessorKey, ReplacedAccessor> mapOldAccessorsOfUpgradedProperties(List<UpgradedProperty> upgradedProperties) {
        return upgradedProperties.stream()
            .flatMap(UpgradePropertiesRuleSetup::mapOldAccessorsOfUpgradedProperty)
            .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
    }

            profile.activation(activation.build());
        }

        profile.properties(modelProfile.getProperties().entrySet().stream()
                .collect(Collectors.toMap(
                        e -> e.getKey().toString(), e -> e.getValue().toString())));

        List<org.apache.maven.api.model.Repository> repos = modelProfile.getRepositories();
        if (repos != null) {

                            null));

            Map<String, ArtifactRepository> repos =
                    res.getVersions().stream().collect(Collectors.toMap(v -> v.toString(), res::getRepository));

            return new VersionRangeResolverResult() {
                @Override
                public List<Exception> getExceptions() {
                    return res.getExceptions();

                                        + ":" + goal)))));
        return goals.entrySet().stream()
                .collect(Collectors.toMap(Map.Entry::getKey, e -> new LifecyclePhase(String.join(",", e.getValue()))));
    }

    public Map<String, LifecyclePhase> getDefaultLifecyclePhases() {
        return defaultPhases;
    }

    @Deprecated