resolve-markers 

Class: \CPSIT\Typo3Handlebars\DataProcessing\ResolveMarkersProcessor

Replaces marker-style keys (e.g., ###NAV_ITEMS### ) in the processed data with the values stored under those keys. The typical pattern is to use a marker as a named placeholder early in the chain — either as the as target of a preceding processor or directly in a variables entry — and then resolve all markers to clean variable names in a final step. This keeps intermediate processors decoupled from the variable names the template expects.

tt_content.my_element = HANDLEBARSTEMPLATE
tt_content.my_element {
    templateName = MyElement

    dataProcessing {
        # Declare the expected output slots early using markers — these
        # names will become the final template variables
        10 = menu
        10 {
            as = ###mainNavigation###
            levels = 2
        }

        20 = menu
        20 {
            as = ###footerLinks###
            special = directory
            special.value = 42
        }

        # Resolve all markers to clean variable names in one final step
        90 = resolve-markers
        90.removeNonMatchingMarkers = 1
    }
}

After processing, the template receives mainNavigation and footerLinks as clean variable names. The markers at the top of the chain serve as upfront documentation of what the template expects, while the processors that follow fill those slots independently.