Accepts one role, or one subject, or attribute definition, or attribute definition name to get permission assignments for. You can mix and match, but at least one must be passed in (e.g. you can query for a subject's permissions in a role)
Documentation: SOAP(click on getPermissionAssignmentsLite), REST(click on getPermissionAssignmentsLite)
For REST, the request can put data in query string (in URL or request body)
REST request (colon is escaped to %3A):
GET /grouper-ws/servicesRest/v1_6_000/permissionAssignments
Note: if passing data in request body e.g. actAs, use a POST