public Optional<Project> getExecutionProject(Project project) {
        // Session keep tracks of the Project per project id,
        // so we cannot use session.getProject(p) for forked projects
        // which are temporary clones
        return Optional.ofNullable(getMavenProject(project).getExecutionProject())
                .map(p -> new DefaultProject(session, p));
    }

    private MavenProject getMavenProject(Project project) {

     * @since 3.0 (addition of the <code>MavenSession</code> parameter)
     */
    ToolchainPrivate[] getToolchainsForType(String type, MavenSession context) throws MisconfiguredToolchainException;

    /**
     * Stores the toolchain into build context for later use by toolchain-aware plugins.
     *
     * @param toolchain the toolchain to store, must not be {@code null}
     * @param context the Maven session, must not be {@code null}

     */
    void addRepository(@Nonnull Session session, Repository repository, boolean replace) throws ModelResolverException;

    /**
     * Clones this resolver for usage in a forked resolution process. In general, implementors need not provide a deep
     * clone. The only requirement is that invocations of {@link #addRepository(Session, Repository)} on the clone do not affect

                            v = value = new AltRes(e);
                        }
                    }
                }
            }
            if (v instanceof AltRes) {
                uncheckedThrow(((AltRes) v).t);
            }
            return (T) v;
        }

        static class AltRes {
            final Throwable t;

            AltRes(Throwable t) {
                this.t = t;

    }

    @Override
    public MavenSession clone() {
        try {
            MavenSession clone = (MavenSession) super.clone();
            // the default must become the current project of the thread that clones this
            MavenProject current = getCurrentProject();
            // we replace the thread local of the clone to prevent write through and enforce the new default value