code: public static final void transform(Group group, Matrix4d m) {
  		for (Atom atom : group.getAtoms()) {
  			transform(atom, m);
  		}
  		for (Group altG : group.getAltLocs()) {
  			transform(altG, m);
  		}
  	}
docs: Transforms a group object, given a Matrix4d (i.e. the vecmath library
  double-precision 4x4 rotation+translation matrix). The transformation
  Matrix must be a post-multiplication Matrix.
  
  @param group
  @param m