[SIR] Use shorter parameter names for some elements in visitor methods

native/swift/sir/tree-generator/src/org/jetbrains/kotlin/sir/tree/generator/SwiftIrTree.kt

@@ -43,6 +43,8 @@ object SwiftIrTree : AbstractSwiftIrTreeBuilder() {
 
     val foreignDeclaration by sealedElement {
         parent(declaration)
+
+        visitorParameterName = "declaration"
     }
 
     val named by sealedElement {
@@ -53,6 +55,8 @@ object SwiftIrTree : AbstractSwiftIrTreeBuilder() {
         customParentInVisitor = declaration
         parent(declaration)
         parent(named)
+
+        visitorParameterName = "declaration"
     }
 
     val enum: Element by element {
@@ -86,5 +90,7 @@ object SwiftIrTree : AbstractSwiftIrTreeBuilder() {
         customParentInVisitor = callable
         parent(callable)
         parent(foreignDeclaration)
+
+        visitorParameterName = "function"
     }
 }

native/swift/sir/tree-generator/src/org/jetbrains/kotlin/sir/tree/generator/model/Element.kt

@@ -20,8 +20,7 @@ class Element(name: String, override val propertyName: String) : AbstractElement
 
     override val otherParents: MutableList<ClassRef<*>> = mutableListOf()
 
-    override val visitorParameterName: String
-        get() = safeDecapitalizedName
+    override var visitorParameterName: String = safeDecapitalizedName
 
     override val hasAcceptMethod: Boolean
         get() = true