// has been uploaded using the S3 singlepart API.
//
// Parts may panic if the ETag is an invalid multipart
// ETag.
func (e ETag) Parts() int {
	if !e.IsMultipart() {
		return 1
	}

	n := bytes.IndexRune(e, '-')
	parts, err := strconv.Atoi(string(e[n+1:]))
	if err != nil {
		panic(err) // malformed ETag
	}
	return parts
}

		}
		_, err := erasure.Encode(context.Background(), bytes.NewReader(content), writers, buffer, erasure.dataBlocks+1)
		closeBitrotWriters(writers)
		if err != nil {
			panic(err)
		}
	}
}

func BenchmarkErasureEncodeQuick(b *testing.B) {
	const size = 12 * 1024 * 1024
	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })

		}
		if !Equal(etag, test.Plaintext) {
			t.Fatalf("Test %d: got '%v' - want '%v'", i, etag, test.Plaintext)
		}
	}
}

func must(s string) ETag {
	t, err := Parse(s)
	if err != nil {
		panic(err)
	}
	return t