import java.util.*; | |
class A { | |
Map<String, String> foo() { | |
List<String> list1 = Collections.emptyList(); | |
List<Integer> list2 = Collections.singletonList(1); | |
Set<String> set1 = Collections.emptySet(); | |
Set<String> set2 = Collections.singleton("a"); | |
return Collections.emptyMap(); | |
} | |
} |