code: function preAnalyze(files, done) {
      if(Object.keys(lessDependencies).length > 0) {
        if (typeof done === 'function') done();
        return;
      }
  
      glob(files, function(err, matches) {
        matches.forEach(function(filePath) { 
          updateDependencies({path: filePath}) 
        });
        if (typeof done === 'function') done();
      });
  
      return this;
    }
docs: public