public int IsPreferred(byte[] aContentType, byte[] aDesiredContentType, boolean[] _retval) {
public int IsPreferred(byte[] aContentType, int[] aDesiredContentType, boolean[] _retval) {
	public int IsPreferred(byte[] aContentType, byte[] aDesiredContentType, boolean[] _retval) {		return XPCOM.NS_ERROR_NOT_IMPLEMENTED;	}