deleteDelegate(delegateID) {
ServerAPI.deleteDelegate(delegateID);
var schoolID = _delegates[delegateID].school;
delete _delegates[delegateID];
_schoolsDelegates[schoolID] = _schoolsDelegates[schoolID].filter(d => d.id !== delegateID);
}
deleteDelegate(delegateID, onError) {
ServerAPI.deleteDelegate(delegateID).catch(onError);
delete _delegates[delegateID];
}