Enhancements to DocsList Services

http://googleappsscript.blogspot.com/2010/12/docslist-notifications-and-performance.html

// Get all VIEWERS of a File or Folder

Folder myFolder = DocsList.getFolder("myFolder");

File myFile = myFolder.getFiles()[0];

User[] fileViewers = myFile.getViewers();

myFile.addEditor("myfriend@mydomain.com");

myFile.addViewer("myOtherFriend@mydomain.com");

// Similarly you can make permission changes in bulk

myFolder.addEditors(fileViewers);

myFolder.addViewer(fileViewers);