using pdf with GWT about pdfmake HOT 5 CLOSED

[48268:1209/172822:INFO:CONSOLE(66)] "Uncaught Unrecognized document structure: ["First paragraph","Another paragraph, this time a little bit longer to make sure, this line will be divided into at least two lines"]", source: /Users/palavrov/codigi/ttk/fg-sys/app/node_modules/pdfmake/src/docMeasure.js (66)

    $scope.exportPDF = function() {
        $scope.pdfExportDialog.getFilePath(function(err, path) {
            if(err)
                return;

            var pdfMake = require("pdfmake");

            var fonts = { 
                Roboto: {
                    normal: 'Roboto-Regular.ttf',
                    bold: 'Roboto-Medium.ttf',
                    italics: 'Roboto-Italic.ttf',
                    bolditalics: 'Roboto-Italic.ttf'
                }   
            };  

            var pdfMaker = new pdfMake(fonts);

            var fs = require("fs");

            var docDefinition = { 
                content: [
                    "First paragraph",
                    "Another paragraph, this time a little bit longer to make sure, this line will be divided into at least two lines"
                ]   
            };  

            var pdfDoc = pdfMaker.createPdfKitDocument(docDefinition);
            pdfDoc.pipe(fs.createWriteStream(path));
            pdfDoc.end();

        }.bind(this));
    }.bind(this);

DocMeasure.prototype.measureNode = function(node) {                       
    // expand shortcuts                                                   
    if (node instanceof Array) {                                          
        node = { stack: node };                                           
    } else if (typeof node == 'string' || node instanceof String) {       
        node = { text: node };                                            
    }