Swift: customize UnspecifiedElement

swift/ql/lib/codeql/swift/elements/UnspecifiedElement.qll

@@ -1,4 +1,22 @@
-// generated by codegen/codegen.py, remove this comment if you wish to edit this file
 private import codeql.swift.generated.UnspecifiedElement
+import codeql.swift.elements.Location
 
-class UnspecifiedElement extends Generated::UnspecifiedElement { }
+class UnspecifiedElement extends Generated::UnspecifiedElement {
+  override string toString() {
+    exists(string source, string index |
+      (
+        source = " from " + this.getParent().getPrimaryQlClasses()
+        or
+        not this.hasParent() and source = ""
+      ) and
+      (
+        index = "[" + this.getIndex() + "]"
+        or
+        not this.hasIndex() and index = ""
+      ) and
+      result = "missing " + this.getProperty() + index + source
+    )
+  }
+
+  override Location getImmediateLocation() { result = this.getParent().(Locatable).getLocation() }
+}