lib/Ext/field/Input.js
function() {
        var el = this.input,
            checked;

        if (el) {
            checked = el.dom.checked;
            this._checked = checked;
        }

        return checked;
    }
function() {
        var el = this.input,
            checked;

        if (el) {
            checked = el.dom.checked;
            this._checked = checked;
        }

        return checked;
    }
Returns the `checked` value of this field
@return {Mixed} value The field value