# Testing Change on Maintenance Class

Next, a new read is performed (using the same read header above), and you can perform a change to the page body in the method:

    			protected PageBody changedPageBody(PageBody original)

Here is an example:

    			    protected PageBody changedPageBody(PageBody original) {
    			        original.put(Maintenance.STRUCTURE.ACCUM_ALL_INST_SW, Boolean.TRUE);

    			        ItemList list = original.getList("BCP");
    			        ListBody param = (ListBody) list.getList().get(0);
    			        param.put(Maintenance.STRUCTURE.list_BCP.DESCR50,
    			             "Changed parameter 1");
    			        param.prepareToChange();

    			        return original;
    			    }

A read is performed after the above changes are sent, and the results are compared.

Parent topic: Testing Maintenance Classes