Function plan_http_conditionals 

pub fn plan_http_conditionals(
    headers: &HeaderMap,
    method: DavMethod,
    resource: DavConditionalResource<'_>,
) -> Result<DavConditionalPlan, DavConditionalPlanError>

Converts Actix headers and runs the method-aware conditional request planner.

Errors

Returns a compact typed failure when header conversion or conditional planning fails.