.writeUtf8("--")
        .writeUtf8(boundary)
        .readByteString()

    /**
     * This delimiter typically precedes all subsequent parts. It may also precede the first part
     * if the body contains a preamble.
     */
    private val crlfDashDashBoundary =
      Buffer()
        .writeUtf8("\r\n--")
        .writeUtf8(boundary)
        .readByteString()

    private var partCount = 0
    private var closed = false

//	Headers
//	base64-encoded Bytes
//	-----END Type-----
//
// where [Block.Headers] is a possibly empty sequence of Key: Value lines.
type Block struct {
	Type    string            // The type, taken from the preamble (i.e. "RSA PRIVATE KEY").
	Headers map[string]string // Optional headers.
	Bytes   []byte            // The decoded bytes of the contents. Typically a DER encoded ASN.1 structure.
}