core/src/main/java/io/fabric8/maven/core/config/ProcessorConfig.java
private static List<String> removeDups(List<String> list) {
        List<String> ret = new ArrayList<>();
        for (String el : list) {
            if (!ret.contains(el)) {
                ret.add(el);
            }
        }
        return ret;
    }
private static List<String> removeDups(List<String> list) {
        List<String> ret = new ArrayList<>();
        for (String el : list) {
            if (!ret.contains(el)) {
                ret.add(el);
            }
        }
        return ret;
    }
Only good for small list (that's what we expect for enrichers and generators)