function isNeedCompleteOrdinalData(source) {
    if (source.sourceFormat === SOURCE_FORMAT_ORIGINAL) {
        var sampleItem = firstDataNotNull(source.data || []);
        return sampleItem != null
            && !isArray(getDataItemValue(sampleItem));
    }
}
@param {module:echarts/model/Model} axisModel
@return {module:echarts/data/OrdinalMeta}