Minor refactoring

idea/src/org/jetbrains/kotlin/idea/slicer/InflowSlicer.kt

@@ -86,7 +86,7 @@ class InflowSlicer(
     }
 
     private fun processParameter(parameter: KtParameter, includeOverriders: Boolean) {
-        if (!parameter.canProcess()) return
+        if (!canProcessParameter(parameter)) return
 
         val function = parameter.ownerFunction ?: return
 

idea/src/org/jetbrains/kotlin/idea/slicer/OutflowSlicer.kt

@@ -35,7 +35,7 @@ class OutflowSlicer(
     }
 
     private fun processVariable(variable: KtCallableDeclaration) {
-        if (variable is KtParameter && !variable.canProcess()) return
+        if (variable is KtParameter && !canProcessParameter(variable)) return
 
         val withDereferences = parentUsage.params.showInstanceDereferences
         val accessKind = if (withDereferences) AccessKind.READ_OR_WRITE else AccessKind.READ_ONLY

idea/src/org/jetbrains/kotlin/idea/slicer/Slicer.kt

@@ -130,7 +130,7 @@ abstract class Slicer(
         }
     }
 
-    protected fun KtParameter.canProcess() = !isVarArg
+    protected fun canProcessParameter(parameter: KtParameter) = !parameter.isVarArg
 
     protected val DeclarationDescriptorWithSource.originalSource: SourceElement
         get() {