Remove insertRange.

editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart

 library java.core;
 
 import "dart:math" as math;
 import "dart:uri";
 
 class JavaSystem {
   static int currentTimeMillis() {
     return (new DateTime.now()).millisecondsSinceEpoch;
   }
 
@@ skipping 312 matching lines @@
   Iterable<E> getRange(int start, int end) => elements.getRange(start, end);
 
   void setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) {
     elements.setRange(start, end, iterable, skipCount);
   }
 
   void removeRange(int start, int end) {
     elements.removeRange(start, end);
   }
 
-  void insertRange(int start, int length, [E fill]) {
-    elements.insertRange(start, length, fill);
-  }
-
   Map<int, E> asMap() {
     return elements.asMap();
   }
 }
 
 class JavaIterator<E> {
   Iterable<E> _iterable;
   List<E> _elements = new List<E>();
   int _coPos = 0;
   int _elPos = 0;
@@ skipping 86 matching lines @@
       }
     } else if (sb.length > newLength) {
       var s = sb.toString().substring(0, newLength);
       sb = new StringBuffer(s);
     }
   }
   void clear() {
     sb = new StringBuffer();
   }
 }