furrr_options           Options to fine tune furrr
future_imap             Apply a function to each element of a vector,
                        and its index via futures
future_map              Apply a function to each element of a vector
                        via futures
future_map2             Map over multiple inputs simultaneously via
                        futures
future_map_if           Apply a function to each element of a vector
                        conditionally via futures
future_modify           Modify elements selectively via futures
