code: function(entity, options) {
    options = options || {};
    options.checkext = options.checkext || checkext;
    options.extlist = options.extlist || extlist;
    options.logFormat = options.logFormat || '%s: %s';
    options.logger = options.logger || console;
    options.ignore = options.ignore || false;
    options.cwd = options.cwd || '';
  
    this.options = options;
    this.scripts = [];
    if (!(options.extlist instanceof RegExp) && options.extlist instanceof Array){
        this.__log('Converting extension list to regular expression');
        options.extlist = new RegExp('(.*)(' + options.extlist.join('$|').replace(/\./g,'\\.') + ')');
    };
    this.__log('Using regular expression' + options.extlist + 'for extenstion matching');
    this.then(entity);
  
    return this;
  }
docs: ExpressLoad constructor.