## Documenting the callback { #documenting-the-callback }

The actual callback code will depend heavily on your own API app.

And it will probably vary a lot from one app to the next.

It could be just one or two lines of code, like:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

            largeContent.append("Line ").append(i).append(" with some content\n");
        }
        final InputStream in = new ByteArrayInputStream(largeContent.toString().getBytes());

        final ExtractData result = textExtractor.getText(in, null);

        assertNotNull(result);
        assertNotNull(result.getContent());
        assertTrue("Should contain line 0", result.getContent().contains("Line 0"));

        }
    }

    @Override
    public void add(ModelProblemCollectorRequest req) {
        int line = -1;
        int column = -1;
        String source = null;
        String modelId = null;

        if (req.getLocation() != null) {
            line = req.getLocation().getLineNumber();
            column = req.getLocation().getColumnNumber();

<img src="/img/tutorial/generate-clients/image08.png">

## Beneficios { #benefits }

Cuando uses los clientes generados automáticamente obtendrás **autocompletado** para:

* Métodos.
* Payloads de request en el body, parámetros de query, etc.
* Payloads de response.

También tendrás **errores en línea** para todo.

     * @param line The one-based index of the line containing the problem or {@code -1} if unknown.
     * @param column The one-based index of the column containing the problem or {@code -1} if unknown.
     * @param cause The cause of the problem, may be {@code null}.
     */
    void add(SettingsProblem.Severity severity, String message, int line, int column, Exception cause);

                String line;
                while ((line = br.readLine()) != null) {
                    if (StringUtil.isNotBlank(line)) {
                        final Map<String, Map<String, String>> dataObj;
                        if (line.contains("\"_index\"") || line.contains("\"_type\"")) {
                            dataObj = parseObject(mapper, line);
                        } else {

fi

# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
#   set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any

          source.readData(data)
        }

        in 5..7 -> {
          data.writeByte('\n'.code) // 'data' on a line of its own.
        }

        in 8..9 -> {
          id = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }
        }

        in 10..12 -> {
          id = null // 'id' on a line of its own.
        }

        in 13..14 -> {
          type = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }

 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * Provides the API for Maven's command-line interface and tools.
 *
 * <p>This package contains interfaces and classes for:</p>
 * <ul>
 *   <li>Command-line argument parsing and processing</li>
 *   <li>Maven tool invocation ({@code mvn}, {@code mvnenc}, {@code mvnsh})</li>
 *   <li>Core extensions configuration</li>

  text-align: center;
  margin: 4px auto 0 auto;
  line-height: 30px;
  position: relative;
}

.daterangepicker .calendar-time select.disabled {
  color: #ccc;
  cursor: not-allowed;
}

.daterangepicker .drp-buttons {
  clear: both;
  text-align: right;
  padding: 8px;
  border-top: 1px solid #ddd;
  display: none;
  line-height: 12px;
  vertical-align: middle;
}