Consider the following Groovy class:

package test13
abstract class Test13 {
	String foo(Number number, Date date) {
		'Hello'
	}
}

and the following Java class:

package test13;
import java.util.Date;

public class Test13J<T extends Test13> {

	private T test;
	
	void bar() {
		test.foo(1, new Date());
	}
}

If you hit Ctrl+Alt+H (Call Hierarchy) on Test13.foo(Number, Date), the call from Test13J.bar() is not shown.