You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ccittfax.go
    path of file: ./repos/unipdf/internal/ccittfax
    
    the code of the file until where you have to start completion: //
// Copyright 2020 FoxyUtils ehf. All rights reserved.
//
// This is a commercial product and requires a license to operate.
// A trial license can be obtained at https://unidoc.io
//
// DO NOT EDIT: generated by unitwist Go source code obfuscator.
//
// Use of this source code is governed by the UniDoc End User License Agreement
// terms that can be accessed at https://unidoc.io/eula/

package ccittfax ;import (_c "errors";_fa "github.com/unidoc/unipdf/v3/internal/bitwise";_b "io";_g "math";);func (_baec *Decoder )fetch ()error {
    
func (_ecba *Decoder )decode2D ()error {_ecba ._gdc =_ecba ._bae ;_ecba ._gbd ,_ecba ._feb =_ecba ._feb ,_ecba ._gbd ;_dffad :=true ;var (_cfag bool ;_cgca int ;_bef error ;);_ecba ._bae =0;_cca :for _cgca < _ecba ._dcd {_cbb :=_dc ._adcga ;for {_cfag ,_bef =_ecba ._be .ReadBool ();
if _bef !=nil {return _bef ;};_cbb =_cbb .walk (_cfag );if _cbb ==nil {continue _cca ;};if !_cbb ._cdgg {continue ;};switch _cbb ._efe {case _fdd :var _eef int ;if _dffad {_eef ,_bef =_ecba .decodeRun (_bc );}else {_eef ,_bef =_ecba .decodeRun (_fd );};
if _bef !=nil {return _bef ;};_cgca +=_eef ;_ecba ._gbd [_ecba ._bae ]=_cgca ;_ecba ._bae ++;if _dffad {_eef ,_bef =_ecba .decodeRun (_fd );}else {_eef ,_bef =_ecba .decodeRun (_bc );};if _bef !=nil {return _bef ;};_cgca +=_eef ;_ecba ._gbd [_ecba ._bae ]=_cgca ;
_ecba ._bae ++;case _dce :_ebf :=_ecba .getNextChangingElement (_cgca ,_dffad )+1;if _ebf >=_ecba ._gdc {_cgca =_ecba ._dcd ;}else {_cgca =_ecba ._feb [_ebf ];};default:_bfgg :=_ecba .getNextChangingElement (_cgca ,_dffad );if _bfgg >=_ecba ._gdc ||_bfgg ==-1{_cgca =_ecba ._dcd +_cbb ._efe ;
}else {_cgca =_ecba ._feb [_bfgg ]+_cbb ._efe ;};_ecba ._gbd [_ecba ._bae ]=_cgca ;_ecba ._bae ++;_dffad =!_dffad ;};continue _cca ;};};return nil ;};func (_gfd *Decoder )decodeG32D ()error {_gfd ._gdc =_gfd ._bae ;_gfd ._gbd ,_gfd ._feb =_gfd ._feb ,_gfd ._gbd ;
_ecb :=true ;var (_ceb bool ;_bec int ;_cfe error ;);_gfd ._bae =0;_ggbg :for _bec < _gfd ._dcd {_eea :=_dc ._adcga ;for {_ceb ,_cfe =_gfd ._be .ReadBool ();if _cfe !=nil {return _cfe ;};_eea =_eea .walk (_ceb );if _eea ==nil {continue _ggbg ;};if !_eea ._cdgg {continue ;
};switch _eea ._efe {case _fdd :var _fbd int ;if _ecb {_fbd ,_cfe =_gfd .decodeRun (_bc );}else {_fbd ,_cfe =_gfd .decodeRun (_fd );};if _cfe !=nil {return _cfe ;};_bec +=_fbd ;_gfd ._gbd [_gfd ._bae ]=_bec ;_gfd ._bae ++;if _ecb {_fbd ,_cfe =_gfd .decodeRun (_fd );
}else {_fbd ,_cfe =_gfd .decodeRun (_bc );};if _cfe !=nil {return _cfe ;};_bec +=_fbd ;_gfd ._gbd [_gfd ._bae ]=_bec ;_gfd ._bae ++;case _dce :_bafg :=_gfd .getNextChangingElement (_bec ,_ecb )+1;if _bafg >=_gfd ._gdc {_bec =_gfd ._dcd ;}else {_bec =_gfd ._feb [_bafg ];
};default:_gec :=_gfd .getNextChangingElement (_bec ,_ecb );if _gec >=_gfd ._gdc ||_gec ==-1{_bec =_gfd ._dcd +_eea ._efe ;}else {_bec =_gfd ._feb [_gec ]+_eea ._efe ;};_gfd ._gbd [_gfd ._bae ]=_bec ;_gfd ._bae ++;_ecb =!_ecb ;};continue _ggbg ;};};return nil ;
};func _cgf (_bddc [][]byte )[][]byte {_aged :=make ([]byte ,len (_bddc [0]));for _dge :=range _aged {_aged [_dge ]=_gbaf ;};_bddc =append (_bddc ,[]byte {});for _eae :=len (_bddc )-1;_eae > 0;_eae --{_bddc [_eae ]=_bddc [_eae -1];};_bddc [0]=_aged ;return _bddc ;
};var _aa =[...][]uint16 {{2,3,4,5,6,7},{128,8,9,64,10,11},{192,1664,16,17,13,14,15,1,12},{26,21,28,27,18,24,25,22,256,23,20,19},{33,34,35,36,37,38,31,32,29,53,54,39,40,41,42,43,44,30,61,62,63,0,320,384,45,59,60,46,49,50,51,52,55,56,57,58,448,512,640,576,47,48},{1472,1536,1600,1728,704,768,832,896,960,1024,1088,1152,1216,1280,1344,1408},{},{1792,1856,1920},{1984,2048,2112,2176,2240,2304,2368,2432,2496,2560}};