code: func (e *baseError) StackAddrs() string {
  	buf := bytes.NewBuffer(make([]byte, 0, len(e.stack)*8))
  	for _, pc := range e.stack {
  		fmt.Fprintf(buf, "0x%x ", pc)
  	}
  	bufBytes := buf.Bytes()
  	return string(bufBytes[:len(bufBytes)-1])
  }
docs: // Implements DropboxError interface.