Kotlin: Move useFunctionCommon

Author: igfoo

java/kotlin-extractor/src/main/kotlin/KotlinUsesExtractor.kt

@@ -1146,15 +1146,6 @@ open class KotlinUsesExtractor(
         return res
     }
 
-    fun <T: DbCallable> useFunctionCommon(f: IrFunction, label: String): Label<out T> {
-        val id: Label<T> = tw.getLabelFor(label)
-        if (isExternalDeclaration(f)) {
-            extractFunctionLaterIfExternalFileMember(f)
-            extractExternalEnclosingClassLater(f)
-        }
-        return id
-    }
-
     // These are classes with Java equivalents, but whose methods don't all exist on those Java equivalents--
     // for example, the numeric classes define arithmetic functions (Int.plus, Long.or and so on) that lower to
     // primitive arithmetic on the JVM, but which we extract as calls to reflect the source syntax more closely.
@@ -1224,6 +1215,15 @@ open class KotlinUsesExtractor(
             useFunctionCommon<T>(it, getFunctionLabel(it, parentId, classTypeArgsIncludingOuterClasses))
         }
 
+    private fun <T: DbCallable> useFunctionCommon(f: IrFunction, label: String): Label<out T> {
+        val id: Label<T> = tw.getLabelFor(label)
+        if (isExternalDeclaration(f)) {
+            extractFunctionLaterIfExternalFileMember(f)
+            extractExternalEnclosingClassLater(f)
+        }
+        return id
+    }
+
     fun getTypeArgumentLabel(
         arg: IrTypeArgument
     ): TypeResult<DbReftype> {