for(HasBindingGroup hbg : bg.matrices.keySet()) {
matrices.put((T)hbg, bg.matrices.get(hbg).times(m));
hbg.bindingGroup = this;
}
for(HasBindingGroup hbg : bg.matrices.keySet()) {
matrices.put((T)hbg, bg.matrices.get(hbg).times(m));
hbg.bindingGroup = this;
}