How to pass selected records from form to dilog in AX 2012

static void main(Args args)
{
     
FormDataSource formDataSource;
;
if(args.record().TableId == tablenum(MBSJEMJournalTable))
{
 // assigning the selected record
 formDataSource = args.record().dataSource(); 
}   
if(XXXXXX.prompt())
{
   XXXXXX.XXXXXXX(formDataSource);
}
}

private void XXXX(FormDataSource XXXX_ds)

if(XXX_ds.anyMarked())

{
  TableName = XXX_ds.getFirst(1,false);

while(TableName)
{
}
}