Make it possible to get a list of emails from a group and clarify the scripting functions in this domain

Currently, if I need to notify a list of people in a group using automation, the only trick I found is to assign a permission to this group on a document, and then call "GetPrincipalEmails" giving the permission I assigned (which I made sure was not an existing one for real, so as to be sure to get back only the group I specified).

This is obviously not ok, and I think that we should have,overall:

• operations:
  • GetUsersAndGroupsForPermission (same as the one currently not nicely called "GetUsersAndGroups"). It would return Principals, with ability to resolve groups as for today

• Scripting functions:
  • List<String>getEmails(List<Principal>)
  • String getEmail(Principal)

• these 2 functions are not needed:
  1. the first one is already existing: List<String> getPrincipalEmails(List<Principal>)
  2. for the second one you can simply use "principal.email"

• • List<Principal> getPrincipalsFromGroup(String group)

With this, I'll be able to cover the following usecases:

• Assign tasks to some users having a specific permission on a docuemnt
• Assign tasks to some hardcoded groups

and notify everybody by email when I need, without having to use some weird tricks