Estou precisando criar um dataset customizado para trazer o histórico do processo:

function createDataset(fields, constraints, sortFields) {
    var dataset = DatasetBuilder.newDataset();
    dataset.addColumn("metadata#id");
    dataset.addColumn("metadata#version");   
    dataset.addColumn("movementDate");
    dataset.addColumn("movementHour");
    dataset.addColumn("stateSequence");
    dataset.addColumn("realDateTime");
    dataset.addColumn("previousMovementSequence");

    //Cria a constraint para buscar os formulários ativos
    var cst = DatasetFactory.createConstraint("metadata#active", true, true, ConstraintType.MUST);    
    var constraints_ = [];
    constraints_[0] = cst;

    for(z = 0; z < constraints.length; z++)
        constraints_[z + 1] = (DatasetFactory.createConstraint(constraints[z].fieldName, constraints[z].initialValue, constraints[z].finalValue, ConstraintType.MUST));

    var companyId = "1";
    var datasetPrincipal = DatasetFactory.getDataset("Frm_SCMA", null, constraints_, null);

    for (var i = 0; i < datasetPrincipal.rowsCount; i++) {        
        var processInstanceId = datasetPrincipal.getValue(i, "TxtNumSolicitacao");       
        var constraints = [];
        constraints[0] = DatasetFactory.createConstraint("processHistoryPK.processInstanceId", processInstanceId, processInstanceId, ConstraintType.MUST);         
        var DatasetHistorico = DatasetFactory.getDataset("processHistory", null, constraints, null); 

        for (var j = 0; j < DatasetHistorico.rowsCount; j++) {           
            dataset.addRow(new Array(
                    datasetPrincipal.getValue(i, "metadata#id"), 
                    datasetPrincipal.getValue(i, "metadata#version"),
                    DatasetHistorico.getValue(j, "movementDate"),
                    DatasetHistorico.getValue(j, "movementHour"),
                    DatasetHistorico.getValue(j, "stateSequence"),
                    DatasetHistorico.getValue(j, "realDateTime"),
                    DatasetHistorico.getValue(j, "previousMovementSequence")
                )
            );        
        }
    }      
    return dataset;                 
}