Refactor: move utilities to a separate file

idea/src/org/jetbrains/jet/plugin/conversion/copy/ConvertJavaCopyPastePostProcessor.kt

@@ -98,14 +98,6 @@ public class ConvertJavaCopyPastePostProcessor() : CopyPastePostProcessor<TextBl
         return StringUtil.convertLineSeparators(result.toString())
     }
 
-    private val TextRange.start: Int
-        get() = getStartOffset()
-    private val TextRange.end: Int
-        get() = getEndOffset()
-    //TODO: not private due to KT-4340
-    val PsiElement.range: TextRange
-        get() = getTextRange()!!
-
     private fun convertRangeToKotlin(file: PsiJavaFile,
                                      range: TextRange,
                                      converter: Converter): String {

idea/src/org/jetbrains/jet/plugin/conversion/copy/RangeUtils.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.conversion.copy
+
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiElement
+
+//NOTE: should be moved to some "util" place
+
+public val TextRange.start: Int
+    get() = getStartOffset()
+
+public val TextRange.end: Int
+    get() = getEndOffset()
+
+public val PsiElement.range: TextRange
+    get() = getTextRange()!!