def get_exclude_unset() -> ModelDefaults:
    return ModelDefaults(x=None, y="y")


@app.get(
    "/exclude_defaults",
    response_model=ModelDefaults,
    response_model_exclude_defaults=True,
)
def get_exclude_defaults() -> ModelDefaults:
    return ModelDefaults(x=None, y="y")


@app.get(
    "/exclude_none", response_model=ModelDefaults, response_model_exclude_none=True
)
def get_exclude_none() -> ModelDefaults:

      <codeSegments>
        <codeSegment>
          <version>4.0.0+</version>
          <code>
            <![CDATA[
    public boolean isExcludeDefaults() {
        return (getExcludeDefaults() != null) ? Boolean.parseBoolean(getExcludeDefaults()) : false;
    }

            ]]>
          </code>
        </codeSegment>
        <codeSegment>
          <version>4.0.0/4.0.99</version>
          <code>