new_line = insert_elem(split_line, 2, last_async_call_src)
new_line = insert_elem(split_line, 3, last_async_call_dst)
new_line = insert_elem(split_line, 4, "0")
new_line = insert_elem(split_line, 2, last_async_call_src)
new_line = insert_elem(split_line, 3, last_async_call_dst)
new_line = insert_elem(split_line, 4, "0")