private Set<IMethod> getIMethods(MethodWrapper[] methodWrappers) {
		  Set<IMethod> c = new HashSet<IMethod>(); 
		  for (MethodWrapper m : methodWrappers) {
		   IMethod im = getIMethodFromMethodWrapper(m);
		   if (im != null) {
		    c.add(im);
		   }
		  }
		  return c;
	}