In the examples we use a `MSS` type, which is a `map[string]string` that is `msgp` serializable.

```go
    handler := func(request *grid.MSS) (*grid.MSS, *grid.RemoteErr) {
        fmt.Println("Got request with field", request["myfield"])
        // Do something with payload
        return NewMSSWith(map[string]string{"result": "ok"}), nil
    }
	
    // Create a typed handler.

				_, err = hash.Write([]byte{byte(i)})
				failOnErr(err)
				_, err = hash.Write(data)
				failOnErr(err)
				got[conf] = map[ErasureAlgo]uint64{algo: hash.Sum64()}
			}

			if a, b := want[conf], got[conf]; !reflect.DeepEqual(a, b) {
				fmt.Fprintf(os.Stderr, "%v: error on self-test [d:%d,p:%d]: want %#v, got %#v\n", algo, conf[0], conf[1], a, b)
				ok = false
				continue
			}
			// Delete first shard and reconstruct...

			if want.CreatedBy != kms.StubCreatedBy {
				t.Fatalf("want key created by %s, got %s", kms.StubCreatedBy, want.CreatedBy)
			}
			if want.CreatedAt != kms.StubCreatedAt {
				t.Fatalf("want key created at %s, got %s", kms.StubCreatedAt, want.CreatedAt)
			}
			if test.wantKeyNames[i] != want.Name {
				t.Fatalf("want key name %s, got %s", test.wantKeyNames[i], want.Name)
			}
		}
	}

	if !reflect.DeepEqual(expectedAPIEndpoints, newAPIEndpoints) {
		t.Fatalf("Expected %#v, got %#v", expectedAPIEndpoints, newAPIEndpoints)
	}

	apiEndpoints = []string{"http://%%%%%:9000"}
	newAPIEndpoints = stripStandardPorts(apiEndpoints, "")
	if !reflect.DeepEqual(apiEndpoints, newAPIEndpoints) {
		t.Fatalf("Expected %#v, got %#v", apiEndpoints, newAPIEndpoints)
	}

			return err
		}
		return nil
	})
	if err != nil {
		t.Errorf(fmt.Sprintf("WithSingleConnection should work, but got err %v", err))
	}

	if actualName != expectedName {
		t.Errorf("WithSingleConnection() method should get correct value, expect: %v, got %v", expectedName, actualName)
	}
}

func getSetSQL(driverName string) (string, string) {
	switch driverName {
	case mysql.Dialector{}.Name():

		}

		stmt.AddClause(c)
	}

	stmt.Build(buildNames...)

	if strings.TrimSpace(stmt.SQL.String()) != result {
		t.Errorf("SQL expects %v got %v", result, stmt.SQL.String())
	}

	if !reflect.DeepEqual(stmt.Vars, vars) {
		t.Errorf("Vars expects %+v got %v", stmt.Vars, vars)
	}

	if c.expectedOutput != "" && c.expectedOutput != output {
		t.Fatalf("Unexpected output for 'istioctl %s'\n got: %q\nwant: %q", strings.Join(c.args, " "), output, c.expectedOutput)
	}

	if c.expectedString != "" && !strings.Contains(output, c.expectedString) {
		t.Fatalf("Output didn't match for '%s %s'\n got %v\nwant: %v", cmd.Name(), strings.Join(c.args, " "), output, c.expectedString)
	}

	if c.wantException {

		c.Fatalf("access keys mismatch: expected: %v, got: %v", expectedAccKeys, res)
	}

	accKeyInfo, err := s.adm.InfoServiceAccount(ctx, "u4ccRswj62HV3Ifwima7")
	if err != nil {
		c.Fatalf("Unable to get service account info: %v", err)
	}
	if accKeyInfo.ParentUser != "uid=svc.algorithm,ou=swengg,dc=min,dc=io" {

		if r.expectedMin > 0 {
			if r.bytesRead < r.expectedMin {
				return 0, SizeTooSmall{Want: r.expectedMin, Got: r.bytesRead}
			}
		}
		if r.expectedMax > 0 {
			if r.bytesRead > r.expectedMax {
				return 0, SizeTooLarge{Want: r.expectedMax, Got: r.bytesRead}
			}
		}

		if r.sha256 != nil {
			if sum := r.sha256.Sum(nil); !bytes.Equal(r.contentSHA256, sum) {

				t.Error(errors.New("expected error, found success"))
			}

			if len(ekvs) != len(testCase.expectedEkvs) {
				t.Errorf("expected %v keys, got %v keys", len(testCase.expectedEkvs), len(ekvs))
			}

			if !reflect.DeepEqual(ekvs, testCase.expectedEkvs) {
				t.Errorf("expected %v, got %v", testCase.expectedEkvs, ekvs)
			}
		})
	}