Which method will support for gridafter and wAfter in Table_Row_Properties give example code for below JSON?

Aspose.Words Product Family
1 
{
  "type": "TABLE_ROW_PROPERTIES",
  "content": [
    {
      "type": "gridAfter",
      "attributes": {
        "val": "1"
      }
    },
    {
      "type": "wAfter",
      "attributes": {
        "w": "755",
        "type": "DXA"
      }
    },
    {
      "type": "ROW_HEIGHT",
      "attributes": {
        "val": "1244"
      }
    }
  ]
},
2

@AAddd Unfortunately, it is not quite clear what properties you would like to get/set. If possible please point the appropriate properties in MS Word. In general, you can set row properties using appropriate RowFormat:
https://reference.aspose.com/words/java/com.aspose.words/rowformat/