public boolean contains(K k ,T t) { return containsKey(new Pair<>(k,t)); }
public boolean contains(K k ,T t) { return containsKey(new Pair<>(k,t)); }
public boolean contains(K k ,T t) { return containsKey(new Pair<>(k,t)); }
public boolean contains(K k ,T t) { return containsKey(new Pair<>(k,t)); }