index.js

var loadQueue = function (filters, callback) { 
    $.getJSON("<hostname>", {"q": JSON.stringify({"filters": filters})}, function (response) {
        var queueList = response.objects;
        var queueSize = response.num_results;
        callback(queueList, queueSize);
    });
}; 
function updateProcessing(processing, size) {
    var in_processing_update = $("#in_processing").dynatable().data('dynatable');
    console.log("in_processing_update: " + in_processing_update); // THIS RETURNS NULL
    //in_processing.settings.dataset.records = processing;
    //in_processing.process();
    //console.log(in_processing.settings)
   setTimeout(getProcessing, 1*1000);
};
function getProcessing() {
    var filters = [{"name": "processing", "op": "eq", "val": 1}];
    loadQueue(filters, updateProcessing);
}
function processing_trWriter(rowIndex, record, columns, cellWriter) {
    if (rowIndex > 5) return false;
    return "<tr><td>" + record.first_name + " " + record.last_name + "</td></tr>";
}
$(document).ready(function () {
   var in_processing_init = $("#in_processing").dynatable({
        features: {
            paginate: false,
            sort: false,
            search: false,
            recordCount: false,
            perPageSelect: false,
        },
        dataset: {
            records: []
        },
        writers: {
            _rowWriter: processing_trWriter
        }
    }).data('dynatable');
   console.log("in_processing_init: " + in_processing_init); // This returns null.
   getProcessing();
});