kotlin jsonobject get nested
val jsonString = """
{
"urls": {
"raw": "https://images.unsplash.com/photo-1461988320302-91bde64fc8e4?ixid=2yJhcHBfaWQiOjEyMDd9",
"full": "https://images.unsplash.com/photo-1461988320302-91bde64fc8e4?ixid=2yJhcHBfaWQiOjEyMDd9&fm=jpg&q=80",
"regular": "https://images.unsplash.com/photo-1461988320302-91bde64fc8e4?ixid=2yJhcHBfaWQiOjEyMDd9&fm=jpg&fit=crop&w=1080&q=80&fit=max",
"small": "https://images.unsplash.com/photo-1461988320302-91bde64fc8e4?ixid=2yJhcHBfaWQiOjEyMDd9&&fm=jpg&w=400&fit=max",
"thumb": "https://images.unsplash.com/photo-1461988320302-91bde64fc8e4?ixid=2yJhcHBfaWQiOjEyMDd9&fm=jpg&w=200&fit=max"
}
}
""".trimIndent()
val json = JSONObject(jsonString)
val rawUrl = json.getJSONObject("urls").getString("raw")