Function resolve_module_confident 

pub fn resolve_module_confident<'db>(
    db: &'db dyn Db,
    resolver_environment: ResolverEnvironment<'db>,
    module_name: &ModuleName,
) -> Option<Module<'db>>

Resolves a module name to a module, without desperate resolution available.

This is appropriate for resolving a KnownModule, or cases where for whatever reason we don’t have a well-defined importing file.