@J2ktIncompatible
  @GwtIncompatible // used only from suite
  public static final class ImmutableIntArrayAsListGenerator extends TestIntegerListGenerator {
    @Override
    protected List<Integer> create(Integer[] elements) {
      return makeArray(elements).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  public static final class ImmutableDoubleArrayAsListGenerator extends TestDoubleListGenerator {
    @Override
    protected List<Double> create(Double[] elements) {
      return makeArray(elements).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite

For example, if you need to store it in a database.

For that, **FastAPI** provides a `jsonable_encoder()` function.

## Using the `jsonable_encoder`

Let's imagine that you have a database `fake_db` that only receives JSON compatible data.

For example, it doesn't receive `datetime` objects, as those are not compatible with JSON.

   * those that are mapped to null values only.
   */
  public ImmutableList<R> rowKeyList() {
    return rowList;
  }

  /**
   * Returns, as an immutable list, the column keys provided when the table was constructed,
   * including those that are mapped to null values only.
   */
  public ImmutableList<C> columnKeyList() {
    return columnList;
  }

    tags=["custom"],
    responses={403: {"description": "Operation forbidden"}},
)
async def update_item(item_id: str):
    if item_id != "plumbus":
        raise HTTPException(
            status_code=403, detail="You can only update the item: plumbus"
        )

  /**
   * The HTTP <a href="http://w3.org/TR/CSP/#content-security-policy-report-only-header-field">
   * {@code Content-Security-Policy-Report-Only}</a> header field name.
   *
   * @since 15.0
   */
  public static final String CONTENT_SECURITY_POLICY_REPORT_ONLY =
      "Content-Security-Policy-Report-Only";
  /**
   * The HTTP nonstandard {@code X-Content-Security-Policy} header field name. It was introduced in

  // Allowed values are "Exact" or "Equivalent".
  //
  // - Exact: match a request only if it exactly matches a specified rule.
  // For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1,
  // but "rules" only included `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]`,

      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability
      incurred by, or claims asserted against, such Contributor by reason

      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability
      incurred by, or claims asserted against, such Contributor by reason

      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability
      incurred by, or claims asserted against, such Contributor by reason