class SequenceManager implements SequenceDescriptorHolder {

    public void removeSequenceDescriptors(final String groupName) {
        Iterator<SequenceDescriptor> descItr = descriptors.values().iterator();
        SequenceDescriptor actualDescriptor = null;
        while (descItr.hasNext()) {
            actualDescriptor = descItr.next();
            if (groupName.equals(actualDescriptor.getGroupName())) {
                descItr.remove();
            }
        }
    }

}