urls = Collections.emptyList();
}
PropertiesPuller props_puller = new PropertiesPuller();
for (URL url : urls) {
try {
Properties props = props_puller.pull(url);
for (Object key : props.keySet()) {
String name = (String)key;
StringTokenizer st = new StringTokenizer(props.getProperty(name), "|");
String description = st.hasMoreTokens() ? Strings.trimToNull(st.nextToken()) : null;
Set<String> extensions = st.hasMoreTokens() ? Strings.uniqueSplitTrimToNull(st.nextToken(), ",") : null;