import org.apache.maven.internal.impl.model.DefaultModelTransformerContext.Holder;

/**
 * Builds up the transformer context.
 * After the buildplan is ready, the build()-method returns the immutable context useful during distribution.
 * This is an inner class, as it must be able to call readRawModel()
 *
 * @since 4.0.0
 */

import org.eclipse.aether.RepositorySystemSession.SessionBuilder;

/**
 * Factory for Resolver session.
 *
 * @since 4.0.0
 */
public interface RepositorySystemSessionFactory {
    /**
     * Creates "ready to use" session builder instance. The factory does not set up one thing: the
     * {@link org.eclipse.aether.repository.WorkspaceReader}s, that is caller duty to figure out. Workspace readers

     * @param session The build session in whose context the mojo will be used, must not be {@code null}.
     * @param mojoExecution The mojo execution to retrieve the mojo for, must not be {@code null}.
     * @return The ready-to-execute mojo, never {@code null}.
     */
    <T> T getConfiguredMojo(Class<T> mojoInterface, MavenSession session, MojoExecution mojoExecution)
            throws PluginConfigurationException, PluginContainerException;

When a plugin has a complete and valid configuration, the plugin would be looked up in the Plexus container and be ready to perform any operations requested of it.

h3. Execution of the plugin