What is list state in email template and where it comes from?

[mcsymiv]

hi, facing an issue described in https://github.com/FusionAuth/fusionauth-issues/issues/2481#issuecomment-4518879119, and one of the comments has this solution:

[#list state!{} as key, value][#if key != "tenantId" && key != "client_id" && value??][#assign url = url + "&" + key?url + "=" + value?url/][/#if][/#list]

it fixed the issue,
but what is list state exactly, i could find it in my email template, but somehow this condition gets executed, what is or where state object is coming from?