anchor.diff:  	put/9,
   	delete/7,
   	await/4,
  +	await/5,
  +	await_body/5,
   	signature_v2/5,
   	signature_v2/7,
   	access_token_v2/2,
  
positive.code: 
  -spec await(pid(), reference(), non_neg_integer(), response_handler()) -> any().
  await(Pid, Ref, Timeout, Handle) ->
  	await_response(Pid, Ref, Timeout, Handle).
  
  -spec signature_v2(iodata(), iodata(), iodata(), iodata(), headers()) -> iodata().
  signature_v2(Secret, Method, Resource, Date, Headers) ->
  
negative.code: amz_headers([], L) ->
  	L.
  
  -spec parse_resource_bucket(binary()) -> binary().
  parse_resource_bucket(<<$/, Rest/bits>>) ->
  	parse_resource_bucket(Rest, <<>>).
  