PsiClass classDef = //assume this is set to the class definition in question PsiElement classElement = classDef.getContainingFile(); PsiElement resolveScope = classElement.getResolveScope(); PsiPackage classPackage = JavaPsiFacade.getInstance(resolveScope.getProject()).findPackage(classDef.getPackageName());In this example, the `classDef` variable holds the definition of a Java class, and `getContainingFile()` returns the PSI element representing the file in which the class is defined. The `getResolveScope()` method is then called on this element to determine the scope in which the class can be resolved. Finally, the `findPackage()` method of the `JavaPsiFacade` class is used to locate the package in which the class is defined, based on the package name obtained from the `getPackageName()` method of the `classDef` object. Overall, the `getResolveScope()` method is a useful tool for Java developers working with PSI elements in IntelliJ IDEA, allowing them to determine the scope in which a particular element can be resolved and to locate related dependencies and packages as needed.