code: public static Symmetry convertSpaceGroupToSymmetry(SpaceGroup sg) {
  		Symmetry sym = new Symmetry();
  		sym.setSpace_group_name_H_M(sg.getShortSymbol());
  		// TODO do we need to fill any of the other values?
  		return sym;
  	}
docs: Converts a SpaceGroup object to a {@link Symmetry} object.
  @param sg
  @return