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50 
51 //! [0]
52     <category>[.<type>] = true|false
53 //! [0]
54 
55 //! [1]
56     QLoggingCategory::setFilterRules("*.debug=false\n"
57                                      "driver.usb.debug=true");
58 //! [1]
59 
60 //! [2]
61     [Rules]
62     *.debug=false
63     driver.usb.debug=true
64 //! [2]
65 
66 //! [3]
67     QT_LOGGING_RULES="*.debug=false;driver.usb.debug=true"
68 //! [3]
69