def METHOD_NAME(runner):
    runner.metadata["description"] = "Async tree workloads."
    runner.metadata["async_tree_recurse_levels"] = NUM_RECURSE_LEVELS
    runner.metadata["async_tree_recurse_branches"] = NUM_RECURSE_BRANCHES
    runner.metadata["async_tree_random_seed"] = RANDOM_SEED
    runner.metadata["async_tree_io_sleep_time"] = IO_SLEEP_TIME
    runner.metadata["async_tree_memoizable_percentage"] = MEMOIZABLE_PERCENTAGE
    runner.metadata["async_tree_cpu_probability"] = CPU_PROBABILITY
    runner.metadata["async_tree_factorial_n"] = FACTORIAL_N