Issue 17024. Quick Fix to find imported library.

pkg/analysis_server/lib/src/services/correction/strings.dart

 // Copyright (c) 2014, 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.
 
 library services.src.correction.strings;
 
 
 /**
  * "$"
  */
@@ skipping 107 matching lines @@
 }
 
 
 String repeat(String s, int n) {
   StringBuffer sb = new StringBuffer();
   for (int i = 0; i < n; i++) {
     sb.write(s);
   }
   return sb.toString();
 }
+
+
+/**
+ * Gets the substring after the last occurrence of a separator.
+ * The separator is not returned.
+ */
+String substringAfterLast(String str, String separator) {
+  if (isEmpty(str)) {
+    return str;
+  }
+  if (isEmpty(separator)) {
+    return '';
+  }
+  int pos = str.lastIndexOf(separator);
+  if (pos == -1) {
+    return str;
+  }
+  return str.substring(pos + separator.length);
+}