/**
     * Returns the current maven version
     * @return the maven version, never {@code null}
     */
    @Nonnull
    Version getMavenVersion();

    int getDegreeOfConcurrency();

    @Nonnull
    Instant getStartTime();

    /**
     * Gets the directory of the topmost project being built, usually the current directory or the

            }

            lineage.add(model);

            if (currentData == superData) {
                break;
            }

            // add repositories specified by the current model so that we can resolve the parent
            if (!model.getRepositories().isEmpty()) {
                List<String> oldRepos = request.getModelRepositoryHolder().getRepositories().stream()

        VersionRange range1 = VersionRange.createFromVersionSpec("1.0");
        VersionRange range2 = VersionRange.createFromVersionSpec("1.1");
        VersionRange mergedRange = range1.restrict(range2);
        // TODO current policy is to retain the original version - is this correct, do we need strategies or is that
        // handled elsewhere?

        }

        Version current;
        try {
            String mavenVersion = getMavenVersion();
            if (mavenVersion.isEmpty()) {
                throw new IllegalArgumentException("Could not determine current Maven version");
            }

            current = versionScheme.parseVersion(mavenVersion);

        }
        Version current;
        try {
            current = versionScheme.parseVersion(currentVersion);
        } catch (InvalidVersionSpecificationException e) {
            throw new IllegalStateException("Could not parse current Java version", e);
        }
        if (constraint.getRange() == null) {
            return constraint.getVersion().compareTo(current) <= 0;
        }

    int MANAGE_ARTIFACT = 7;

    int OMIT_FOR_CYCLE = 8;

    /**
     * this event means that the artifactScope has NOT been updated to a farther node artifactScope because current
     * node is in the first level pom
     */
    int UPDATE_SCOPE_CURRENT_POM = 9;

    int SELECT_VERSION_FROM_RANGE = 10;

    int RESTRICT_RANGE = 11;

    int MANAGE_ARTIFACT_VERSION = 12;

    int MANAGE_ARTIFACT_SCOPE = 13;

            desc.setArtifactId(PluginDescriptor.getDefaultPluginArtifactId("toolchains"));

            MavenProject current = session.getCurrentProject();

            if (current != null) {
                // TODO why is this using the context
                context = session.getPluginContext(desc, current);
            }
        }

        return (context != null) ? context : new HashMap<>();
    }

 * <p>
 * There are several issues/discussions regarding how "aggregator" plugins should be handled.
 * Read for instance http://docs.codehaus.org/display/MAVEN/Deterministic+Lifecycle+Planning
 * </p>
 * <p>
 * In their current implementation they are "bolted" onto the lifecycle by separating them
 * into TaskSegments. This class represents the execution context of one such task segment.
 * </p>
 * <p>

import java.lang.annotation.Target;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Used to configure your Mojo parameters to be injected by
 * <a href="/ref/current/maven-core/apidocs/org/apache/maven/plugin/MavenPluginManager.html">
 * <code>MavenPluginManager.getConfiguredMojo(...)</code></a>.
 * <p>

                return;
            }
            if (!isRequirementMet) {
                throw new IllegalStateException("Required Maven version " + requiredMavenVersion
                        + " is not met by current version " + runtimeInformation.getMavenVersion());
            }
        }
    }