|  | library; | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  | import "dart:collection" as col; | 
|  |  | 
|  | static method nullAwareListSpread(core::List<core::String>? list) → dynamic { | 
|  | list = block { | 
|  | final core::List<core::String> #t1 = core::_GrowableList::_literal1<core::String>("foo"); | 
|  | final core::Iterable<core::String>? #t2 = list; | 
|  | if(!(#t2 == null)) | 
|  | #t1.{core::List::addAll}{Invariant}(#t2{core::Iterable<core::String>}){(core::Iterable<core::String>) → void}; | 
|  | } =>#t1; | 
|  | } | 
|  | static method nullAwareSetSpread(core::Set<core::String>? set) → dynamic { | 
|  | set = block { | 
|  | final core::Set<core::String> #t3 = new col::_Set::•<core::String>(); | 
|  | #t3.{core::Set::add}{Invariant}("foo"){(core::String) → core::bool}; | 
|  | final core::Iterable<core::String>? #t4 = set; | 
|  | if(!(#t4 == null)) | 
|  | #t3.{core::Set::addAll}{Invariant}(#t4{core::Iterable<core::String>}){(core::Iterable<core::String>) → void}; | 
|  | } =>#t3; | 
|  | } | 
|  | static method nullAwareMapSpread(core::Map<core::int, core::String>? map) → dynamic { | 
|  | map = block { | 
|  | final core::Map<core::int, core::String> #t5 = <core::int, core::String>{}; | 
|  | #t5.{core::Map::[]=}{Invariant}(0, "foo"){(core::int, core::String) → void}; | 
|  | final core::Map<core::int, core::String>? #t6 = map; | 
|  | if(!(#t6 == null)) | 
|  | #t5.{core::Map::addAll}{Invariant}(#t6{core::Map<core::int, core::String>}){(core::Map<core::int, core::String>) → void}; | 
|  | } =>#t5; | 
|  | } | 
|  | static method main() → dynamic { | 
|  | self::nullAwareListSpread(null); | 
|  | self::nullAwareSetSpread(null); | 
|  | self::nullAwareMapSpread(null); | 
|  | } |