/**
* Get all prefixes for the specified Namespace URI in this namespace context.
* @fbscript
*/
public Iterator getPrefixes(final String namespaceURI) {
return new IteratorWrapper(
new FilteredIterator(definitions.values().iterator()) {
protected boolean accept( Object object ) {
Definition d = (Definition)object;
return StringUtil.equals(d.uri, namespaceURI);
}