Markdown Handlebar in Kibana

Hey! Im trying to understand Handlebar when using Visual Builder in Kibana.
I have a few data sources named cars, cities ect. How do I access a specific array within the _all because I want to do something different with each array.

I know this:
{{#each _all}}
{{#with cars as |mydest|}}
{{../label}} -
{{/with}}
{{/each}}

but is there something more like:

{{#if _all.cars}}
DO ONE THING
{{#else}}
DO ONE THING
{{/if}}

Basically. How do I access individual data sources from within _all without loop through _all

Help would be appreciated!

You should be able to use all of handlebar's features in markdown: https://handlebarsjs.com/builtin_helpers.html
As for data sources, the markdown in Visual Builder only uses the result from the "Data" tab, where you get the results of an ES query.