func (wr *WatchResponse) Err() error {
	switch {
	case wr.closeErr != nil:
		return v3rpc.Error(wr.closeErr)
	case wr.CompactRevision != 0:
		return v3rpc.ErrCompacted
	case wr.Canceled:
		if len(wr.cancelReason) != 0 {
			return v3rpc.Error(status.Error(codes.FailedPrecondition, wr.cancelReason))
		}
		return v3rpc.ErrFutureRev
	}
	return nil
}
func (wr *WatchResponse) Err() error {
	switch {
	case wr.closeErr != nil:
		return v3rpc.Error(wr.closeErr)
	case wr.CompactRevision != 0:
		return v3rpc.ErrCompacted
	case wr.Canceled:
		if len(wr.cancelReason) != 0 {
			return v3rpc.Error(status.Error(codes.FailedPrecondition, wr.cancelReason))
		}
		return v3rpc.ErrFutureRev
	}
	return nil
}
func ( wr * WatchResponse ) Err ( ) error { switch { case wr . closeErr != nil : return v3rpc . Error ( wr . closeErr ) case wr . CompactRevision != 0 : return v3rpc . ErrCompacted case wr . Canceled : if len ( wr . cancelReason ) != 0 { return v3rpc . Error ( status . Error ( codes . FailedPrecondition , wr . cancelReason ) ) } return v3rpc . ErrFutureRev } return nil }
// Err is the error value if this WatchResponse holds an error.
Err is the error value if this WatchResponse holds an error .