package pkg; import java.io.Serializable; import java.util.Collection; import java.util.Comparator; class Bounds { public static <T extends Object & Comparable<? super T> & Serializable> T max(Collection<? extends T> coll) { return null; } public static <T> T max(Collection<? extends T> coll, Comparator<? super T> comp) { return null; } }