package com.iluwatar.generic;

public interface Observer<S extends Observable<S, O, A>, O extends Observer<S, O, A>, A> {
    public void update(S subject, A argument);
}

package com.iluwatar.generic;

public interface Observer<S extends Observable<S, O, A>, O extends Observer<S, O, A>, A> {

    void update(S subject, A argument);
}

Remove unnecessary declarations in observer pattern.
[refactor] Remove unnecessary declarations in observer pattern.
