code: public QueryAtomGroupImpl bind(QueryBinding binding) {
          QueryAtomGroupImpl group = new QueryAtomGroupImpl();
          for (QueryAtom atom : atoms) {
              group.addAtom(atom.bind(binding));
          }
          return group;
      }
docs: A convenience method to clone the atom group instance while inserting a new binding
  to all atoms of the group.
  The instance and the atoms will be cloned.