Get some tests running using the analysis driver

pkg/analysis_server/lib/src/utilities/null_string_sink.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file

[scheglov, 2016/12/09 16:28:22]

2016

[Brian Wilkerson, 2016/12/09 16:32:39]

Sure, done. I just copied it from the file that contained it.

+// 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.
+
+/**
+ * A string sink that ignores everything written to it.
+ */
+class NullStringSink implements StringSink {
+  void write(Object obj) {}
+  void writeAll(Iterable objects, [String separator = ""]) {}
+  void writeCharCode(int charCode) {}
+  void writeln([Object obj = ""]) {}
+}