How to Async Base64 Decode in Tcl - Code Snippet

# Task: Async Base64 Decode
# Language: Tcl

proc async_base64_decode() {
    # Implementation for Async Base64 Decode
    set result = ...; # Initialize variable
    # TODO: Implement core logic here
    # Step 1: Prepare data
    # Step 2: Process Async Base64 Decode
    puts("Done");
}