this.fileSaveSync = function (file, data) {

        var fs = require('fs-extra');

        fs.writeFileSync(file, data)

    };

var svgns = '<?xml version="1.0" standalone="no"?>';   

svgns += svgHtml;             

var fileName = mb.editor.common.getRandomName();             

var dir = mb.editor.common.imagedir + fileName + '.svg';

mb.editor.common.fileSaveSync(dir, svgns);