code: public void writeInData(int hashCode, byte[] b, int offset, int len) {
          if (inStream != null && (hashCode == -1 || hashCode == inHashCode)) {
              inStream.write(b, offset, len);
          }
      }
docs: This method writes data to the in buffer.
  
  @param hashCode The hash code, or -1 to ignore the hash code
  @param b The bytes
  @param offset The offset
  @param len The length