How replace deprecated getDependencyProject() in a backwards compatible way?

I am really stuck on this. I maintain a plugin written in Groovy DSL. There is one place where the now deprecated getDependencyProject() (to be removed in Gradle 9) is used:

private static List<Project> getAllDependentProjectsExt(Project project, Set<Project> handledProjects) {
    if(handledProjects.contains(project)) return []
    handledProjects << project
    def projectDependencies = project.configurations*.dependencies*.withType(ProjectDependency).flatten() as Set<ProjectDependency>
    List<Project> dependentProjects = projectDependencies*.dependencyProject
    dependentProjects.each {
        dependentProjects += getAllDependentProjectsExt(it, handledProjects)
    }
    return dependentProjects.unique()
}

The Gradle upgrade documentation has this to say:

To access or configure the target project, consider this direct replacement:

val projectDependency: ProjectDependency = getSomeProjectDependency()

// Old way: val someProject = projectDependency.dependencyProject

// New way: val someProject = project.project(projectDependency.path)

That's alright so far, but ProjectDependency.path was only introduced in 8.11. And all that I found is that prior to Gradle 8.11, the only way to get the path of a ProjectDependency is using the now deprecated dependencyProject.

Does anyone know how to solve this without bumping the minimum Gradle version to 8.11 for the plugin?

This was solved by someone following the GitHub issue where I mentioned this. Simply use @CompileDynamic and different branches for the Gradle versions:

    private static boolean GRADLE_VER_GTE_811 = GradleVersion.current().compareTo(GradleVersion.version('8.11'))

    @CompileDynamic
    private static Project getDependencyProject(Project project, ProjectDependency dep) {
        if(GRADLE_VER_GTE_811) {
            return project.project(dep.path)
        } else {
            return dep.dependencyProject
        }
    }