/**
     * Denotes validation as performed by Maven 4.0. This validation level is meant for new projects.
     */
    int VALIDATION_LEVEL_MAVEN_4_0 = 40;

    /**
     * Denotes strict validation as recommended by the current Maven version.
     */
    int VALIDATION_LEVEL_STRICT = VALIDATION_LEVEL_MAVEN_4_0;

    @Nonnull
    Session getSession();

    @Nonnull
    ModelSource getSource();