code: public CacheStream beginStream(String id) throws BaasException {
          DiskLruCache.Editor editor = null;
          OutputStream out = null;
          try {
              editor = mLruCache.edit(id);
              out = editor.newOutputStream(0);
              return new CacheStream(out, editor);
          } catch (IOException e) {
              throw new BaasIOException(e);
          }
      }
docs: -------------------------- OTHER METHODS --------------------------