From 42aa9e23785cf9b291b3cc1f6f66a87eca9caa35 Mon Sep 17 00:00:00 2001
From: Andrey Breslav <andrey.breslav@jetbrains.com>
Date: Fri, 6 Jun 2014 15:00:11 +0400
Subject: [PATCH] Minor. Utility moved to a common place

---
 .../util.runtime/src/org/jetbrains/jet/utils/collections.kt | 6 +++++-
 .../plugin/codeInsight/KotlinCopyPasteReferenceProcessor.kt | 4 +---
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/core/util.runtime/src/org/jetbrains/jet/utils/collections.kt b/core/util.runtime/src/org/jetbrains/jet/utils/collections.kt
index 921fd681d5f..52587adeab8 100644
--- a/core/util.runtime/src/org/jetbrains/jet/utils/collections.kt
+++ b/core/util.runtime/src/org/jetbrains/jet/utils/collections.kt
@@ -79,4 +79,8 @@ public fun <T> Iterable<Iterable<T>>.flatten(): List<T> {
     return flatMapTo(ArrayList<T>(), {it})
 }
 
-public fun <T: Any> emptyOrSingletonList(item: T?): List<T> = if (item == null) listOf() else listOf(item)
\ No newline at end of file
+public fun <T: Any> emptyOrSingletonList(item: T?): List<T> = if (item == null) listOf() else listOf(item)
+
+public fun <T: Any> MutableCollection<T>.addIfNotNull(t: T?) {
+    if (t != null) add(t)
+}
\ No newline at end of file
diff --git a/idea/src/org/jetbrains/jet/plugin/codeInsight/KotlinCopyPasteReferenceProcessor.kt b/idea/src/org/jetbrains/jet/plugin/codeInsight/KotlinCopyPasteReferenceProcessor.kt
index 75cee97f8a3..3ada61534df 100644
--- a/idea/src/org/jetbrains/jet/plugin/codeInsight/KotlinCopyPasteReferenceProcessor.kt
+++ b/idea/src/org/jetbrains/jet/plugin/codeInsight/KotlinCopyPasteReferenceProcessor.kt
@@ -370,6 +370,4 @@ private fun PsiElement.isInCopiedArea(fileCopiedFrom: JetFile, startOffsets: Int
         val (start, end) = it
         range in TextRange(start, end)
     }
-}
-
-private fun <T : Any> MutableCollection<T>.addIfNotNull(el: T?) = ContainerUtil.addIfNotNull(this, el)
\ No newline at end of file
+}
\ No newline at end of file