@property<EOL><INDENT>def numRegisteredByRole(self):<DEDENT>
role_list = list(self.availableRoles) + [None,]<EOL>return {getattr(x,'<STR_LIT:name>',None):self.numRegisteredForRole(x) for x in role_list}<EOL>
Return a dictionary listing registrations by all available roles (including no role)