//     Say we are rotating abcdefgh by 5. We start with abcde|fgh. The smaller block is [fgh]:
    //     [abc]de|[fgh] -> [fgh]de|[abc]. Now [fgh] is in the right place, but we need to swap [de]
    //     with [abc]: fgh[de]|a[bc] -> fgh[bc]|a[de]. Now we need to swap [a] with [bc]:
    //     fgh[b]c|[a]de -> fgh[a]c|[b]de. Finally we need to swap [c] with [b]:
    //     fgha[c]|[b]de -> fgha[b]|[c]de. Because these two blocks are the same size, we are done.

    peer.acceptFrame() // HEADERS STREAM 3
    peer.sendFrame().windowUpdate(3, 5)
    peer.acceptFrame() // DATA STREAM 3 "abcde"
    peer.sendFrame().windowUpdate(3, 5)
    peer.acceptFrame() // DATA STREAM 3 "fghi"
    peer.play()

    // Play it back.
    val connection = connect(peer)
    connection.writePingAndAwaitPong() // Ensure the SETTINGS have been received.

//		{Offset: 21, Length: 4},  // Hole fragment for 21..24
//	}
//
// Then the content of the resulting sparse file with a Header.Size of 25 is:
//
//	var sparseFile = "\x00"*2 + "abcde" + "\x00"*11 + "fgh" + "\x00"*4
type (
	sparseDatas []sparseEntry
	sparseHoles []sparseEntry
)

// validateSparseEntries reports whether sp is a valid sparse map.

0E84          ; valid                                  # 1.1  LAO LETTER KHO TAM
0E85          ; disallowed                             # NA   <reserved-0E85>
0E86          ; valid                                  # 12.0 LAO LETTER PALI GHA
0E87..0E88    ; valid                                  # 1.1  LAO LETTER NGO..LAO LETTER CO
0E89          ; valid                                  # 12.0 LAO LETTER PALI CHA

A,4CADA,yD2Bx/GI,YAAA,KAIJ,qBAAuB,aAAA,KACvB,oBAAsB,YAAA,KAQtB,kBACE,QAAA,YAAA,QAAA,KACA,eAAA,OAAA,YAAA,OACA,QAAA,QAAA,OACA,cAAA,E1BwBI,UAAA,K0BtBJ,YAAA,IACA,YAAA,IACA,MAAA,QACA,WAAA,OACA,YAAA,OACA,iBAAA,QACA,OAAA,IAAA,MAAA,QnB1GE,cAAA,OR6mHJ,uC2B/gHA,oCAkBI,WAAA,E3BkgHJ,+B2Bx/GA,4CAEE,OAAA,yB3B2/GF,+B2Bx/GA,8B3B4/GA,yCAFA,sDACA,0CAFA,uD2Bn/GE,QAAA,MAAA,K1BXI,UAAA,Q0BaJ,YAAA,InBvIE,cAAA,MRmoHJ,+B2Bx/GA,4CAEE,OAAA,0B3B2/GF,+B2Bx/GA,8B3B4/GA,yCAFA,sDACA,0CAFA,uD2Bn/GE,QAAA,OAAA,M1B5BI,UAAA,Q0B8BJ,...

A,4CADA,yD2Bx/GI,YAAA,KAIJ,qBAAuB,aAAA,KACvB,oBAAsB,YAAA,KAQtB,kBACE,QAAA,YAAA,QAAA,KACA,eAAA,OAAA,YAAA,OACA,QAAA,QAAA,OACA,cAAA,E1BwBI,UAAA,K0BtBJ,YAAA,IACA,YAAA,IACA,MAAA,QACA,WAAA,OACA,YAAA,OACA,iBAAA,QACA,OAAA,IAAA,MAAA,QnB1GE,cAAA,OR6mHJ,uC2B/gHA,oCAkBI,WAAA,E3BkgHJ,+B2Bx/GA,4CAEE,OAAA,yB3B2/GF,+B2Bx/GA,8B3B4/GA,yCAFA,sDACA,0CAFA,uD2Bn/GE,QAAA,MAAA,K1BXI,UAAA,Q0BaJ,YAAA,InBvIE,cAAA,MRmoHJ,+B2Bx/GA,4CAEE,OAAA,0B3B2/GF,+B2Bx/GA,8B3B4/GA,yCAFA,sDACA,0CAFA,uD2Bn/GE,QAAA,OAAA,M1B5BI,UAAA,Q0B8BJ,...