+ " is missing.",
                    dependency.getLocation(""));
            return null;
        }

        String imported = groupId + ':' + artifactId + ':' + version;

        if (importIds.contains(imported)) {
            StringBuilder message =
                    new StringBuilder("The dependencies of type=pom and with scope=import form a cycle: ");

        List<ReportSet> pluginReportSets = plugin.getReportSets();
        ReportSet reportSet = pluginReportSets.stream()
                .filter(rs -> rs.getId().equals(expectedId))
                .findFirst()
                .orElse(null);
        assertNotNull(reportSet, "Wrong id for \"" + artifactId + "\"");

        String config = reportSet.getConfiguration().toString();
        assertTrue(

                            errOn30,
                            Version.V20,
                            prefix + prefix2 + "classifier",
                            key,
                            "must be empty, imported POM cannot have a classifier.",
                            dependency);
                }
            } else if ("system".equals(dependency.getScope())) {

   * transformation function.
   *
   * <p>The primary audience of this method is callers of {@code transform} who don't have a {@code
   * ListenableFuture} available and do not mind repeated, lazy function evaluation.
   *
   * @param input The future to transform
   * @param function A Function to transform the results of the provided future to the results of
   *     the returned future.