private static Item convertInstantArg(final Instant val) {
        final Item item;
        item = StringValue.makeStringValue(DateUtil.createNormalDateTimeString(
                val.toEpochMilli()));
        return item;
    }
Converts a list of objects into an array of {@link Sequence}

@param args
@return
stroom-pipeline/src/test/java/stroom/pipeline/xsltfunctions/AbstractXsltFunctionTest.java