code: func (opts Options) Get(key string) string {
  	for i := len(opts) - 1; i >= 0; i-- {
  		o := opts[i]
  		if o.IsKey(key) {
  			return o.Value
  		}
  	}
  	return ""
  }
docs: // Get gets the value for the given key if set,
  // otherwise it returns the empty string.
  //
  // Note that there is no difference
  //
  // This matches git behaviour since git v1.8.1-rc1,
  // if there are multiple definitions of a key, the
  // last one wins.
  //
  // See: http://article.gmane.org/gmane.linux.kernel/1407184
  //
  // In order to get all possible values for the same key,
  // use GetAll.