Defining Relations Between DocumentTable Instances Loaded from a Single Document Leave feedback

const java = require('java');
const groupdocs = require('@groupdocs/groupdocs.assembly');

// Extract column names from the first row of every table.
const columnNameExtractingDocumentTableLoadHandler = java.newProxy('com.groupdocs.assembly.IDocumentTableLoadHandler', {
    handle: function (args) {
        args.setOptions(new groupdocs.DocumentTableOptions());
        args.getOptions().setFirstRowContainsColumnNames(true);
    }
});

const tableSet = new groupdocs.DocumentTableSet('Related Tables Data.xlsx',
    columnNameExtractingDocumentTableLoadHandler);

// Define relations between tables.
// NOTE: For spreadsheet documents, table names are extracted from worksheet names.
const tables = tableSet.getTables();
tableSet.getRelations().add(
    tables.get('CLIENT').getColumns().get('ID'),
    tables.get('CONTRACT').getColumns().get('CLIENT_ID'));
tableSet.getRelations().add(
    tables.get('MANAGER').getColumns().get('ID'),
    tables.get('CONTRACT').getColumns().get('MANAGER_ID'));

// Pass DocumentTableSet as a data source.
const assembler = new groupdocs.DocumentAssembler();
assembler.assembleDocument('Using Document Table Relations.docx', 'out.docx',
    new groupdocs.DataSourceInfo(tableSet));

process.exit(0);