* eagerly fetches data for each source when iterated (rather than producing sources that only
   * load data through their streams). Prefer using the {@link #concat(Iterable)} overload if
   * possible.
   *
   * @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @throws NullPointerException if any of {@code sources} is {@code null}

   * eagerly fetches data for each source when iterated (rather than producing sources that only
   * load data through their streams). Prefer using the {@link #concat(Iterable)} overload if
   * possible.
   *
   * @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @throws NullPointerException if any of {@code sources} is {@code null}

      }
  }

  internal data class Message(
    val bytes: ByteString? = null,
    val string: String? = null,
  )

  internal data class Ping(
    val payload: ByteString,
  )

  internal data class Pong(
    val payload: ByteString,
  )

  internal data class Closing(
    val code: Int,
    val reason: String,
  )

  internal data class Closed(
    val code: Int,

    public String available;

    /** Search/filter parameter for data configuration sort order. */
    public String sortOrder;

    /** Search/filter parameter for data configuration creator. */
    public String createdBy;

    /** Search/filter parameter for data configuration creation time. */
    public String createdTime;

    /**
     * Send data using RDMA
     *
     * @param data data buffer to send
     * @param region registered memory region for the data
     * @throws IOException if send fails
     */
    public abstract void send(ByteBuffer data, RdmaMemoryRegion region) throws IOException;

    /**
     * Receive data using RDMA
     *
     * @param timeout timeout in milliseconds

`JSONResponse` itself is a sub-class of `Response`.

///

And when you return a `Response`, **FastAPI** will pass it directly.

It won't do any data conversion with Pydantic models, it won't convert the contents to any type, etc.

This gives you a lot of flexibility. You can return any data type, override any data declaration or validation, etc.

## Using the `jsonable_encoder` in a `Response` { #using-the-jsonable-encoder-in-a-response }

package org.codelibs.fess.app.web.api.admin.dataconfig;

import org.codelibs.fess.app.web.admin.dataconfig.EditForm;

/**
 * Request body class for data config edit operations in the admin REST API.
 * This class extends EditForm to inherit the necessary form validation and binding capabilities
 * for data configuration management operations.
 */
public class EditBody extends EditForm {

    /**
     * Default constructor.
     */

	}

	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	data, err := json.Marshal(cfgList)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	econfigData, err := madmin.EncryptData(password, data)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

                logger.warn("Interrupted job at {}", parentThread.getName());
            }
        }
    }

    /**
     * Cleans up the crawled data for a given session.
     * Deletes URL queue data and access result data, and clears the URL filter.
     * @param sessionId The session ID to clean up.
     */
    public void cleanup(final String sessionId) {
        // TODO transaction?

        assertEquals(0x01, dst[0], "Data block type");
        assertEquals(3, dst[1] & 0xFF, "Data length low byte");
        assertEquals(0, dst[2] & 0xFF, "Data length high byte");
        assertEquals(2, dst[3], "First data byte");
        assertEquals(3, dst[4], "Second data byte");
        assertEquals(4, dst[5], "Third data byte");
    }

    /**