@InvisibleQualifier
@SubtypeOf(value={})
@DefaultQualifierInHierarchy
@Documented
@Retention(value=RUNTIME)
@Target(value={TYPE_USE,TYPE_PARAMETER})
public @interface UnknownKeyFor
Indicates that the value assigned to the annotated variable is not known to be a key for any
map. It is the top type qualifier in the KeyFor
hierarchy. It is also the default type
qualifier.