Bug 79976 RippleMethodFinder doesn't work with generics
See RippleMethodFinderTests.
org.eclipse.jdt.ui.tests.refactoring/resources/RippleMethodFinder/A_test9.java
package p;
class Generic<G> {
	void take(G g) {}
}
class Impl extends Generic<Integer> {
	void take(Integer g) {}
}
class Impl extends Generic<String> {
	void take(String g) {}
}