Parse formal parameters.

dart/frog/leg/tree/unparser.dart

 // Copyright (c) 2011, 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.
 
 class DebugUnparser implements Visitor {
   String separator;
   StringBuffer sb;
 
   String unparse(Node node) {
     separator = '';
@@ skipping 71 matching lines @@
         visit(element);
       }
     }
     if (node.endToken !== null) sb.add(node.endToken);
   }
 
   visitOperator(Operator node) {
     visitIdentifier(node);
   }
 
-  visitParameter(Parameter node) {
-    if (node.typeAnnotation !== null) {
-      visit(node.typeAnnotation);
-      sb.add(' ');
-    }
-    visit(node.name);
-  }
-
   visitReturn(Return node) {
     node.beginToken.value.printOn(sb);
     if (node.hasExpression) {
       sb.add(' ');
       visit(node.expression);
     }
     node.endToken.value.printOn(sb);
   }
 
   visitSend(Send node) {
@@ skipping 22 matching lines @@
   visitVariableDefinitions(VariableDefinitions node) {
     if (node.type !== null) {
       visit(node.type);
       sb.add(' ');
     }
     // TODO(karlklose): print modifiers.
     visit(node.definitions, ', ');
     sb.add('; ');
   }
 }