pkg/csslib: fixed analysis error, more cleanup

pkg/csslib/lib/src/tree_printer.dart

Index: pkg/csslib/lib/src/tree_printer.dart
diff --git a/pkg/csslib/lib/src/tree_printer.dart b/pkg/csslib/lib/src/tree_printer.dart
index 8c394766f008acb4c42c3569268acd4d5f339bd9..3a8b74821a1660a24c94932868f315566a75871e 100644
--- a/pkg/csslib/lib/src/tree_printer.dart
+++ b/pkg/csslib/lib/src/tree_printer.dart
@@ -129,9 +129,9 @@ class _TreePrinter extends Visitor {
 
   void visitStyletDirective(StyletDirective node) {
     heading('StyletDirective', node);
-    output.writeValue('dartClassName', node._dartClassName);
+    output.writeValue('dartClassName', node.dartClassName);
     output.depth++;
-    output.writeNodeList('rulesets', node._rulesets);
+    output.writeNodeList('rulesets', node.rulesets);
     output.depth--;
   }
 
@@ -172,7 +172,8 @@ class _TreePrinter extends Visitor {
    */
   void visitIncludeDirective(IncludeDirective node) {
     heading('IncludeDirective ${node.name}', node);
-    output.writeNodeList('parameters', node.args);
+    var flattened = node.args.expand((e) => e).toList();

[terry, 2013/11/07 18:17:05]

Leave writeNodeList and writeList to take a List much simpler usage then having
to remember to flatten, etc.

[kevmoo-old, 2013/11/07 18:23:19]

writeNodeList assumes each element in list hase a 'visit' method, no?

I don't see other uses of writeList, so I'm removing it

+    output.writeNodeList('parameters', flattened);
   }
 
   void visitIncludeMixinAtDeclaration(IncludeMixinAtDeclaration node) {
@@ -199,7 +200,7 @@ class _TreePrinter extends Visitor {
   void visitDeclarationGroup(DeclarationGroup node) {
     heading('DeclarationGroup', node);
     output.depth++;
-    output.writeNodeList('declarations', node._declarations);
+    output.writeNodeList('declarations', node.declarations);
     output.depth--;
   }
 
@@ -207,7 +208,7 @@ class _TreePrinter extends Visitor {
     heading('MarginGroup', node);
     output.depth++;
     output.writeValue('@directive', node.margin_sym);
-    output.writeNodeList('declarations', node._declarations);
+    output.writeNodeList('declarations', node.declarations);
     output.depth--;
   }