Fix FunctionTypeAliasElementImpl.visitChildren() for type parameters.

pkg/analyzer/lib/src/dart/element/element.dart

Index: pkg/analyzer/lib/src/dart/element/element.dart
diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index 9892b1870cdf8f0539d655746327278b19b28370..eca92421262506b8fe548fb8c628d996599daf2c 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -1764,7 +1764,7 @@ class CompilationUnitElementImpl extends UriReferencedElementImpl
   void visitChildren(ElementVisitor visitor) {
     super.visitChildren(visitor);
     safelyVisitChildren(accessors, visitor);
-    safelyVisitChildren(_enums, visitor);
+    safelyVisitChildren(enums, visitor);
     safelyVisitChildren(functions, visitor);
     safelyVisitChildren(functionTypeAliases, visitor);
     safelyVisitChildren(types, visitor);
@@ -4861,7 +4861,7 @@ class FunctionTypeAliasElementImpl extends ElementImpl
   void visitChildren(ElementVisitor visitor) {
     super.visitChildren(visitor);
     safelyVisitChildren(parameters, visitor);
-    safelyVisitChildren(_typeParameters, visitor);
+    safelyVisitChildren(typeParameters, visitor);
   }
 }