// ChecksumIncludesMultipart indicates the checksum also contains part checksums.
	ChecksumIncludesMultipart

	// ChecksumNone indicates no checksum.
	ChecksumNone ChecksumType = 0
)

// Checksum is a type and base 64 encoded value.
type Checksum struct {
	Type    ChecksumType
	Encoded string
	Raw     []byte
}

// Is returns if c is all of t.
func (c ChecksumType) Is(t ChecksumType) bool {
	if t == ChecksumNone {