"application/vnd.multiad.creator",
				"application/vnd.multiad.creator.cif",
				"application/vnd.music-niff",
				"application/vnd.musician",
				"application/vnd.muvee.style",
				"application/vnd.ncd.control",
				"application/vnd.ncd.reference",
				"application/vnd.nervana",
				"application/vnd.netfpx",
				"application/vnd.neurolanguage.nlu",
				"application/vnd.noblenet-directory",

     *
     * @param sourceMap The source map containing the date field.
     * @param name The name of the date field.
     * @return The Date object, or null if the field doesn't contain a valid date.
     */
    protected Date getDateFromSource(final Map<String, Object> sourceMap, final String name) {
        final Object obj = sourceMap.get(name);
        if (obj instanceof Date) {

     * @param reader The supplier for DocumentReader.
     * @param docPerReq The number of documents to process per request.
     * @param waitController The runnable to control waiting between requests.
     * @return A Promise that will be resolved with the SuggestIndexResponse or rejected with an error.
     */