code: protected boolean isSpace(String bucketName) {
          boolean isSpace = false;
          // According to AWS docs, the access key (used in DuraCloud as a
          // prefix for uniqueness) is a 20 character alphanumeric sequence.
          if (bucketName.matches("[\\w]{20}[.].*")) {
              isSpace = true;
          }
          return isSpace;
      }
docs: Determines if an S3 bucket is a DuraCloud space
  
  @param bucketName name of the S3 bucket
  @return true if the given S3 bucket name is named according to the
  DuraCloud space naming conventions, false otherwise