code: function filterFileList(compiledFilter, files) {
          if (!compiledFilter) {
              return files;
          }
  
          var re = new RegExp(compiledFilter);
          return files.filter(function (f) {
              return !re.test(f.fullPath);
          });
      }
docs: Returns a copy of 'files' filtered to just those that don't match any of the exclusion globs in the filter.
  
  @param {?string} compiledFilter  'Compiled' filter object as returned by compile(), or null to no-op
  @param {!Array.<File>} files
  @return {!Array.<File>}