These functions might not work due to the drop of API v1 in favor of API v2.
clean_tweets(): No replacement.
collections(): No replacement (It hasn't worked for a while).
direct_messages(): No replacement.
do_call_rbind(): No replacement (if any it will be a method).
get_favorites(): Use tweet_liking_users().
get_followers(): Use user_following().
get_friends(): Use user_followers().
network_data() and network_graph(): No replacement.
list_memberships(): Use list_users().
get_mentions(): Use user_mentions()
user_block(): No replacement.
post_favorite(): No replacement.
post_list(): lists_subscribers(), list_subscriptions(), list_members(), lists_users()
post_tweet(): Use tweet_post().
post_follow(): No replacement.
post_destroy(): Use tweet_delete().
search_fullarchive(): Use tweet_search_all().
search_30d(): Use tweet_search_recent().
rate_limit(): No replacement (already implemented inside the calls).
save_as_csv(): No replacement.
search_tweets(): Use tweet_search_recent().
search_tweets2(): Use tweet_search_recent().
search_users(): Use user_search().
lookup_tweets(): Use tweet_get(), tweet_retweeted_by().
stream_tweets(): Use filtered_stream(), stream_add_rule(), stream_rm_rule() and sample_stream().
get_timeline(): Use user_timeline().
get_my_timeline(): Use user_timeline().
get_token(): Use auth_get().
get_tokens(): Use auth_get().
get_trends(): No replacement.
trends_available() and trends_closest(): No replacement.
ts_data() and ts_plot(): No replacement.
tweet_shot(): No replacement.
tweet_threading(): Use tweet_get() with conversation ID.