in app/com/gu/contentapi/sanity/support/ElkFriendlyReporter.scala [24:33]
private def renderLocationMaybe(loc: Option[Location]) = loc match {
case Some(LineInFile(lineNumber, fileName, filePathname))=>
s"$fileName line $lineNumber"
case Some(TopOfClass(className))=>
s"Top of $className"
case Some(TopOfMethod(className, methodId))=>
s"Top of ${className}.$methodId"
case None=>
"(not provided)"
}