code: function cleanFileSync(srcFilename, targetFilename, options) {
  
    return new SVGCleaner(options)
      .readFileSync(srcFilename)
      .writeFileSync(targetFilename)
      .svgString()
      ;
  
  }
docs: simple interface `var cleanedSvgString = require('svg-cleaner').cleanFile(srcFilename, targetFilename, options)`