Make DirectMethodInvocation a subclass of InvocationExpression.

pkg/kernel/lib/ast.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// -----------------------------------------------------------------------
 ///                           ERROR HANDLING
 /// -----------------------------------------------------------------------
 ///
 /// As a rule of thumb, errors that can be detected statically are handled by
 /// the frontend, typically by translating the erroneous code into a 'throw' or
@@ skipping 1484 matching lines @@
       value?.parent = this;
     }
   }
 
   accept(ExpressionVisitor v) => v.visitDirectPropertySet(this);
 
   DartType getStaticType(TypeEnvironment types) => value.getStaticType(types);
 }
 
 /// Directly call an instance method, bypassing ordinary dispatch.
-class DirectMethodInvocation extends Expression {
+class DirectMethodInvocation extends InvocationExpression {
   Expression receiver;
   Procedure target;
   Arguments arguments;
 
   DirectMethodInvocation(this.receiver, this.target, this.arguments) {
     receiver?.parent = this;
     arguments?.parent = this;
   }
 
+  Name get name => target?.name;
+
   visitChildren(Visitor v) {
     receiver?.accept(v);
     target?.acceptReference(v);
     arguments?.accept(v);
   }
 
   transformChildren(Transformer v) {
     if (receiver != null) {
       receiver = receiver.accept(v);
       receiver?.parent = this;
@@ skipping 2119 matching lines @@
 
   @override
   defaultTreeNode(TreeNode node) {
     if (node == child) {
       return replacement;
     } else {
       return node;
     }
   }
 }