@Override
        public boolean apply(@Nullable String s) {
            return s!=null && !s.isEmpty();
        }
Splits every element in the given list on the last colon in the name and returns a list with
two elements: The left part before the colon and the right part after the colon. If the string
doesn't contain a colon, the value is used for both elements in the returned arrays.

@param listToSplit list of strings to split
@return return list of 2-element arrays or an empty list if the given list is empty or null
src/main/java/io/fabric8/maven/docker/util/EnvUtil.java