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  • How can I send the body to HTTP POST method request? I understand that setBody accepts only string argument and I need to json.serialize(payload). Commented Aug 17, 2022 at 7:26
  • @Stojcheski - you would instantiate the object and assign whatever values needed - I've updated my answer with an example. Commented Aug 17, 2022 at 15:17
  • One more question. I need to set the value of the List<Column> columns to my entry List<String> columns and I get illegal assignment from List to List which is to be expected. So, how do I make the method accept List<Column>? Commented Aug 17, 2022 at 18:47
  • The JSON example provided shows that columns is not an array of Strings, but an array of Objects - this is why we defined an inner class called Column. To convert from your List<String> variable, you may need to iterate over its contents and instantiate column objects. I've provided an example above in my answer. Commented Aug 17, 2022 at 22:17
  • Hey @JesseWheeler I've updated my question with my method and I still cannot solve this problem of how can I send data.columns in my method. Can you provide further explanation on your thought process. I'm sorry for still bothering you about this. Thank you. Commented Aug 24, 2022 at 18:14