[Plugin: Contact Form 7] Maximum Check on Checkboxes

Got this working using jquery. I use this as a reference: https://forum.jquery.com/topic/maximum-checked-checkboxes-in-specifck-div-s

$("#bla :checkbox").click(function() {
    if($("#bla :checkbox:checked").length >= 4) {
        $("#bla :checkbox:not(:checked)").attr("disabled", "disabled");
    } else {
        $("#bla :checkbox").attr("disabled", "");
    }
});
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