java - How to use multiple upper bounds in generics -

i have interface foo has generic type -

 public interface foo<t> {        boolean apply(t t);    }

having class bar implements interface want generic type of bar should collection of type interface , b, below definition giving compiler error -

public class bar implements foo<collection<? extends & b>>{   @override   public boolean apply(collection<? extends & b> collect){    ...   }   }

can suggest correct way achieve this?

i can use multiple bounds @ method level only?

wouldn't work?

public class bar<t extends & b> implements foo<collection<t>>{   @override   public boolean apply(collection<t> collect){    ...   }   }

Assebmley