if (cycle != null) {
            // remove edge which introduced cycle
            removeEdge(from, to);
            throw new CycleDetectedException(
                    "Edge between '" + from.label + "' and '" + to.label + "' introduces to cycle in the graph", cycle);
        }
    }

    void removeEdge(Vertex from, Vertex to) {
        from.children.remove(to);
        to.parents.remove(from);
    }

        Long transferred;
        synchronized (transfers) {
            transferred = transfers.remove(transferEvent.getResource());
        }
        if (transferred != null) {
            event.setTransferredBytes(transferred);
        }

        synchronized (artifacts) {
            artifacts.remove(transferEvent.getResource());
        }

        listener.transferCompleted(event);
    }

     *
     * @param key the key under which to store the session data, must not be {@code null}
     * @param value the data to associate with the key, may be {@code null} to remove the mapping
     */
    <T> void set(@Nonnull Key<T> key, @Nullable T value);

    /**
     * Associates the specified session data with the given key if the key is currently mapped to the given value. This

    public void addMojoExecutionListener(MojoExecutionListener listener) {
        this.listeners.add(listener);
    }

    public void removeMojoExecutionListener(MojoExecutionListener listener) {
        this.listeners.remove(listener);
    }

 * under the License.
 */
package org.apache.maven.api.services.model;

import org.apache.maven.api.model.Model;
import org.apache.maven.api.services.ModelBuilderRequest;

/**
 * Normalizes URLs to remove the ugly parent references "../" that got potentially inserted by URL adjustment during
 * model inheritance.
 *
 */
public interface ModelUrlNormalizer {

    /**

        if (reference != null) {
            reference.set(null);
        }

        if (session == null && reference != null) {
            DefaultLegacySupport.SESSION.remove();
        } else {
            DefaultLegacySupport.SESSION.set(new AtomicReference<>(session));
        }
    }

    public MavenSession getSession() {

                InternalScopeManager.Mode.REMOVE,
                singleton(CommonBuilds.PROJECT_PATH_MAIN, CommonBuilds.BUILD_PATH_RUNTIME),
                Collections.emptySet(),
                nonTransitiveDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_MAIN_RUNTIME_PLUS_SYSTEM,
                InternalScopeManager.Mode.REMOVE,

            List<String> cycle = visitCycle(graph, Collections.singleton(to), new HashMap<>(), new LinkedList<>());
            if (cycle != null) {
                // remove edge which introduced cycle
                throw new CycleDetectedException(
                        "Edge between '" + from + "' and '" + to + "' introduces to cycle in the graph", cycle);
            }
        }
    }

    public MetadataGraph removeVertex(MetadataGraphVertex v) {
        if (vertices != null && v != null) {
            vertices.remove(v);
        }

        if (incidentEdges != null) {
            incidentEdges.remove(v);
        }

        if (excidentEdges != null) {
            excidentEdges.remove(v);
        }

        return this;
    }

                if (file.isDirectory()) {
                    FileUtils.deleteDirectory(file);
                } else {
                    file.delete();
                }
            }

            it.remove();
        }

        warnAboutCleanup = false;
    }

    public void assertFileExistence(File dir, String filename, boolean shouldExist) {
        File file = new File(dir, filename);