final Method m1 = MapType.class.getMethod("mapOfStringToObject");
        final Type t1 = m1.getGenericReturnType();
        assertThat(GenericsUtil.isTypeOf(t1, Map.class), is(true));
        assertThat(GenericsUtil.getKeyTypeOfMap(t1), is(sameClass(String.class)));
        assertThat(GenericsUtil.getValueTypeOfMap(t1), is(sameClass(Object.class)));

        final Method m2 = MapType.class.getMethod("mapOfClassToString");

		}
		f.walk(n.Params, ctxParam, visit)
		if n.Results != nil {
			f.walk(n.Results, ctxParam, visit)
		}
	case *ast.InterfaceType:
		f.walk(n.Methods, ctxField, visit)
	case *ast.MapType:
		f.walk(&n.Key, ctxType, visit)
		f.walk(&n.Value, ctxType, visit)
	case *ast.ChanType:
		f.walk(&n.Value, ctxType, visit)

	case *ast.BadStmt:
	case *ast.DeclStmt:
		f.walk(n.Decl, ctxDecl, visit)