assertThat(UPPER_UNDERSCORE.converterTo(UPPER_CAMEL).convert("FOO_BAR")).isEqualTo("FooBar");
    assertThat(UPPER_UNDERSCORE.converterTo(LOWER_CAMEL).convert("FOO_BAR")).isEqualTo("fooBar");
    assertThat(UPPER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("FooBar")).isEqualTo("FOO_BAR");
    assertThat(LOWER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("fooBar")).isEqualTo("FOO_BAR");
  }

            result.addDependency(convert(dependency, stereotypes));
        }

        DependencyManagement mgmt = model.getDependencyManagement();
        if (mgmt != null) {
            for (org.apache.maven.model.Dependency dependency : mgmt.getDependencies()) {
                result.addManagedDependency(convert(dependency, stereotypes));
            }
        }

    /**
     * Convert a model profile to a settings profile.
     */
    @Nonnull
    org.apache.maven.api.settings.Profile convert(@Nonnull org.apache.maven.api.model.Profile profile);

    /**
     * Convert a settings profile to a model profile.
     */
    @Nonnull
    org.apache.maven.api.model.Profile convert(@Nonnull org.apache.maven.api.settings.Profile profile);

But if the data didn't exist, you want to create it, and return an HTTP status code of "CREATED" `201`.

But you still want to be able to filter and convert the data you return with a `response_model`.

For those cases, you can use a `Response` parameter.

## Use a `Response` parameter { #use-a-response-parameter }

    assertThat(converter.convert("1")).isEqualTo(1);
    assertThat(converter.convert("0")).isEqualTo(0);
    assertThat(converter.convert("-1")).isEqualTo(-1);
    assertThat(converter.convert("0xff")).isEqualTo(255);
    assertThat(converter.convert("0xFF")).isEqualTo(255);
    assertThat(converter.convert("-0xFF")).isEqualTo(-255);
    assertThat(converter.convert("#0000FF")).isEqualTo(255);

andLineConverter.class package org.apache.maven.wrapper.cli; public abstract interface CommandLineConverter { public abstract Object convert(Iterable) throws CommandLineArgumentE; public abstract Object convert(Iterable, Object) throws CommandLineArgumentE; public abstract Object convert(ParsedCommandLine) throws CommandLineArgumentE; public abstract Object convert(ParsedCommandLine, Object) throws CommandLineArgumentE; public abstract void configure(CommandLineParser); } org/apache/maven/wrappe...

## Convert any Data to JSON-compatible { #convert-any-data-to-json-compatible }

To convert any data to JSON-compatible, read the docs for [Tutorial - JSON Compatible Encoder](../tutorial/encoder.md){.internal-link target=_blank}.

            for (ReportSet reportSet : plugin.getReportSets()) {
                Xpp3Dom rs = convert(reportSet);
                reportSets.addChild(rs);
            }
            dom.addChild(reportSets);
        }

        return dom;
    }

    private Xpp3Dom convert(ReportSet reportSet) {
        Xpp3Dom dom = new Xpp3Dom("reportSet", reportSet.getLocation(""));

    assertThat(converter.convert("1.0")).isEqualTo(1.0);
    assertThat(converter.convert("0.0")).isEqualTo(0.0);
    assertThat(converter.convert("-1.0")).isEqualTo(-1.0);
    assertThat(converter.convert("1")).isEqualTo(1.0);
    assertThat(converter.convert("0")).isEqualTo(0.0);
    assertThat(converter.convert("-1")).isEqualTo(-1.0);
    assertThat(converter.convert("1e6")).isEqualTo(1e6);

When you create a **FastAPI** *path operation* you can normally return any data from it: a `dict`, a `list`, a Pydantic model, a database model, etc.

By default, **FastAPI** would automatically convert that return value to JSON using the `jsonable_encoder` explained in [JSON Compatible Encoder](../tutorial/encoder.md){.internal-link target=_blank}.