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debug/moc_mainwindow.o:E:\vboxshare\SDPlayer\progressBar-build-desktop/debug/moc_mainwindow.cpp:95: multiple definition of `MainWindow::changed()'
debug/mainwindow.o:E:\vboxshare\SDPlayer\progressBar-build-desktop/../progressBar/mainwindow.cpp:31: first defined here
collect2: ld returned 1 exit status