Parametrize 'at' closure with arguments from script or spock specs

Question

There is similar question, but without answer Customize 'at' with extra parameters for the closure?

I want to reuse my page objects in different scenarios with different input and expected data. and since "at" method doesn't give me a way to extract expected data from other source like csv file i wonder what is the best practices to do it?

For example i have a scenario

def "Equity mew order creation scenario"() {
    given:
        to PortalPage
    when:
        navigateTo 'Equity Syndicate'
    then:
        at DealCalendarPage

and in DealCalendarPage

static at = {
    $('div', id: 'rightPane').find('tr').text() ==  'Equity Syndicate'
}

now if i want to reuse DealCalendarPage for another scenario i.e for structured products

def "SP mew order creation scenario"() {
    given:
        to PortalPage
    when:
        navigateTo 'Structured Products'
    then:
        at DealCalendarPage

i want to have

static at = {
    $('div', id: 'rightPane').find('tr').text() ==  'Structured products'
}

in DealCalendarPage

but i cannot parametrize my Page Object's "at" method

Or page object's 'at' method is not a good place to do such validation, and i have to do it explicitly in scenario?