use Derivative;
use Builder;
use ;
/// Container for all (if there are any) keys between Prefix and the next
/// occurrence of the string specified by a delimiter. CommonPrefixes lists keys
/// that act like subdirectories in the directory specified by Prefix. For
/// example, if the prefix is notes/ and the delimiter is a slash (/) as in
/// notes/summer/july, the common prefix is notes/summer/.