Suppose you have a SuperClass like this:

public class SuperClass {

    public void method1() {
    }

    /**
     * 
     * Something should really go here.
     * 
     */    
    public void method2() {
    }

}

and SubClasses like this:

public class NewClass1 extends SuperClass {

    public void methodA() {
    }
    
}

public class NewClass2 extends SuperClass {

    public void methodA() {
    }

}

public class NewClass3 extends SuperClass {
    
    public void methodA() {
    }
}

If you push down method2 in SuperClass, it duplicates the comments above it for each class that the method is pushed down to. Resulting in:

public class NewClass1 extends SuperClass {

    public void methodA() {
    }
    
    /**
     * 
     * Something should really go here.
     * 
     */    
    public void method2() {
    }
}

public class NewClass2 extends SuperClass {

    public void methodA() {
    }
    
    /**
     * 
     * Something should really go here.
     * 
     */
    /**
     * 
     * Something should really go here.
     * 
     */       
    public void method2() {
    } 
}

public class NewClass3 extends SuperClass {
    
    public void methodA() {
    }
    
     /**
     * 
     * Something should really go here.
     * 
     */
    /**
     * 
     * Something should really go here.
     * 
     */
    /**
     * 
     * Something should really go here.
     * 
     */         
    public void method2() {
    }
}