anchor.diff:  %%   previously-put keys or to correlate get values with previously-put
   %%   values.
   %%   - Get operation keys that are formatted in with the convention
  -%%     <<"yessir.{integer}.anything">> will use integer (interpreted in
  +%%     `<<"yessir.{integer}.anything">>' will use integer (interpreted in
   %%     base 10) as the returned binary's Size.
   %%
   %% fold_keys and fold_objects are implemented for both sync and async.
  
positive.code: %%
  %% This backend is the Riak storage manager equivalent of:
  %%
  %% * cat > /dev/null
  %% * cat < /dev/zero
  %%
  %% === Configuration Options ===
  %%
  
negative.code: %%                                  the BKey asked for.  The returned object's
  %%                                  BKey is constant, so any part of Riak that
  %%                                  cares about matching/valid BKey inside of
  %%                                  the object will be confused and/or break.</li>
  %% <li>`yessir_aae_mode_encoding' - Specify which mode of behavior to
  %%                                  use when interacting with Riak KV's
  %%                                  anti-entropy mode for put and put_object
  %%                                  calls.
  %%   <ul>
  %%   <li>`constant_binary' - The default mode: lie to AAE by returning
  %%                           a constant binary, `<<>>'. This will cause
  %%                           AAE to maintain a tiny tree of order-size(1).
  %%                           This is the fastest mode but also causes the
  %%                           least amount of AAE work and thus may or may
  %%                           not meet all users' needs. </li>
  %%   <li>`bkey' - Return term_to_binary({Bucket, Key}), which will
  %%                      cause AAE's tree to churn with order-size(NumKeys)
  %%                      but will be much smaller than the entire serialized
  %%                      #r_object{}, so AAE will spend less CPU time during
  %%                      its processing. </li>
  %%   <li>`r_object' - Serialize the entire #r_object{}, like Riak KV
  %%                          does in normal operation.  This mode has the
  %%                          highest overhead per operation. </li>
  %%   </ul></li>
  %% <li>`yessir_default_size' - The number of bytes of generated data for the value.</li>
  %% <li>`yessir_key_count'    - The number of keys that will be folded over, e.g. list_keys().</li>
  %% <li>`yessir_bucket_prefix_list'  - A list {BucketPrefixBin, {Module, Fun}}
  