Generate all runtime files from dart.

lib/src/codegen/js_interop.dart

Index: lib/src/codegen/js_interop.dart
diff --git a/lib/src/codegen/js_interop.dart b/lib/src/codegen/js_interop.dart
index 777a0097bde7e47720d2dd05638683a0c11c2baf..470efed9574a6fa42777929b2a6a8355c44589f1 100644
--- a/lib/src/codegen/js_interop.dart
+++ b/lib/src/codegen/js_interop.dart
@@ -48,3 +48,13 @@ bool isJSExportNameAnnotation(DartObjectImpl value) {
 
 bool isJsPeerInterface(DartObjectImpl value) =>
     value.type.name == 'JsPeerInterface';
+
+/// Whether this invocation represents a `genericTypeConstructor` intrinsic
+/// call, meant to be used only inside `JS` templates.
+///
+/// That intrinsic function is only to be used in JS expressions inside the SDK.
+/// For instance `JS('', '#(type)', genericTypeConstructor(List))` will
+/// generate `core.List$(type)`.
+bool isGenericTypeConstructorIntrinsic(MethodInvocation i) =>
+    _isJsLibType('genericTypeConstructor', i.methodName?.bestElement) &&
+    i.argumentList.arguments.length == 1;