How to perform 'Async DNS Lookup' in SAS.
* Task: Async DNS Lookup
* Language: SAS
%macro async_dns_lookup()
* Implementation for Async DNS Lookup
%let result = ...; * Initialize variable
* TODO: Implement core logic here
* Step 1: Prepare data
* Step 2: Process Async DNS Lookup
%put("Done");
%mend;