Use this class to find stems within the registry
Sample call
Stem stem = StemFinder.findByName(grouperSession, "test", true);
Sample call to find stems where an attribute def name and a value is assigned
Set stems = new StemFinder().assignNameOfAttributeDefName(attributeDefName.getName())
.assignPrivileges(NamingPrivilege.ATTRIBUTE_READ_PRIVILEGES).assignAttributeValue("abc").findStems();