构建src-openeuler/peony遇到‘kdk’ 没有问题

The source code for Peony downloaded from https://gitee.com/src-openeuler/peony encounters the following issue during build:

Source code:

kdk::UkuiStyleHelper::self()->removeHeader(this);

Error:

/home/kaizheng/projects/peony/peony-4.0.0.0/libpeony-qt/file-operation/file-operation-progress-bar.cpp:119: error: ‘kdk’ has not been declared
../../../libpeony-qt/file-operation/file-operation-progress-bar.cpp: In member function ‘void FileOperationProgressBar::showProgress(ProgressBar&)’:
../../../libpeony-qt/file-operation/file-operation-progress-bar.cpp:119:9: error: ‘kdk’ has not been declared
  119 |         kdk::UkuiStyleHelper::self()->removeHeader(this);
      |         ^~~

Could you please explain what kdk is? Where can I find it?
Why can’t I find it anywhere on the internet?

是真让没人理啊!自己的问题自己答:
“git clone https://github.com/ukui/peony.git”
搞定,不用“kdk”