Now I am develope a lib ,the lib can be used in various apps .But a problem come that the lib have to konw or just say connect some signal interested of the apps,the object which can emit the signal interested is not a certain type ,for example ,in app1 the object may be a class1 ,in app2 the object may be class2, so how to connect a certain signal without konw the detial of the object ?
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