}

    private void declareUniqueProjectLibraries(Set<ProjectLibrary> projectLibraries) {
        Set<ProjectLibrary> existingLibraries = rootProject.getExtensions().getByType(IdeaModel.class).getProject().getProjectLibraries();
        Set<ProjectLibrary> newLibraries = Sets.difference(projectLibraries, existingLibraries);
        for (ProjectLibrary newLibrary : newLibraries) {

    lib.name = "someLib"
    lib.classes << file("someClasses.jar")
    lib.javadoc << file("someJavadoc.jar")
    lib.sources << file("someSources.jar")
    projectLibraries << lib
}
""")

        hasProjectLibrary("root.ipr", "someLib", ["someClasses.jar"], ["someJavadoc.jar"], ["someSources.jar"], [])
    }

    private void assertHasExpectedContents(String path) {