DeleteMethod

        
 public <T> boolean deleteNode(final T element)  {


        try (Transaction txn = dgraphClient.newTransaction()) {
            try {
                final DgraphProto.Mutation mutation = getDeleteMutation(element);
                txn.mutate(mutation);
                txn.commit();
                return true;

            } catch (StatusRuntimeException | TxnConflictException | JsonProcessingException dgraphException) {
                txn.discard();
                throw new RuntimeException("Unable to persist the transaction ", dgraphException);
            }
        }
    }