code: function(srcArray, dest, options) {
            if (!srcArray.length) {
              // both no data, don't add to filesArray. (Don't return undefined.)
              return typeof dest === 'string' && fileUpdates.isNew(dest, options);
              // But filesArray isn't usable for 'files', 'cause Grunt doesn't support empty src.
            } else if (!dest) {
              return srcArray.some(function(src) {
                return fileUpdates.isNew(src, options);
              });
            } else if (srcArray.length === 1 &&
                path.resolve(srcArray[0]) === path.resolve(dest)) {
              return fileUpdates.isNew(dest, options);
            }
            // both files
            if (srcArray.length === 1) {
              return fileUpdates.compare(srcArray[0], dest) === 1;
            } else {
              // New file exists.
              return srcArray.some(function(src) {
                return fileUpdates.compare(src, dest) === 1;
              });
            }
          }
docs: 'new' is keyword of language.