library;
import self as self;
import "dart:core" as core;

static method nullAwareListSpread(core::List<core::String*>* list) → dynamic
  ;
static method nullAwareSetSpread(core::Set<core::String*>* set) → dynamic
  ;
static method nullAwareMapSpread(core::Map<core::int*, core::String*>* map) → dynamic
  ;
static method main() → dynamic
  ;