Template method that is to validate the provided Ext.data.Record
against the filters configuration.
@param {Ext.data.Record} record The record to validate
@return {Boolean} true if the record is valid within the bounds
of the filter, false otherwise.
function (record) {
        // remove calls to Ext.Date.clearTime
        var me = this,
            key,
            pickerValue,
            val = record.get(me.dataIndex);

        if(!Ext.isDate(val)){
            return false;
        }

        val = val.getTime();

        for (key in me.fields) {
            if (me.fields[key].checked) {
                pickerValue = me.getFieldValue(key).getTime();
                if (key == 'before' && pickerValue <= val) {
                    return false;
                }
                if (key == 'after' && pickerValue >= val) {
                    return false;
                }
                if (key == 'on' && pickerValue != val) {
                    return false;
                }
            }
        }
        return true;
    }