在這個例子中，它是一個 `str`：

```Python
"{$callback_url}/invoices/{$request.body.id}"
```

所以，如果你的 API 使用者（外部開發者）向「你的 API」送出這樣的請求：

```
https://yourapi.com/invoices/?callback_url=https://www.external.org/events
```

並附上這個 JSON body：

```JSON
{
    "id": "2expen51ve",
    "customer": "Mr. Richie Rich",
    "total": "9999"
}
```

                        </div>
                        <div class="card-body">
                            <%-- Message --%>
                            <div>
                                <la:info id="msg" message="true">
                                    <div class="alert alert-success">${msg}</div>
                                </la:info>
                                <la:errors/>
                            </div>

  ** since Maven 3.5.0, if <<<project.directory>>> POM property value is defined, it is used instead of artifact id:
  this permits default inheritance calculations when module directory name is not equal to artifact id. Notice that this
  property is not inherited from a POM to its child: child's POM will use child artifact id if property is not
  set.

 *   <li>{@code remove}: Removes the element</li>
 * </ul>
 *
 * <p>For complex XML structures, combining can also be done based on:</p>
 * <ul>
 *   <li>ID: Using the {@code combine.id} attribute</li>
 *   <li>Keys: Using the {@code combine.keys} attribute with comma-separated key names</li>
 * </ul>
 *
 * @since 4.0.0
 */
public abstract class XmlService {

                        </div>
                        <div class="card-body">
                            <%-- Message --%>
                            <div>
                                <la:info id="msg" message="true">
                                    <div class="alert alert-success">${msg}</div>
                                </la:info>
                                <la:errors/>
                            </div>

            <la:form action="/admin/fileauth/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2 || crudMode==3 || crudMode==4}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>
                </c:if>
                <la:hidden property="createdBy"/>
                <la:hidden property="createdTime"/>
                <div class="row">

        <section class="content">
            <la:form action="/admin/relatedcontent/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>
                </c:if>
                <la:hidden property="createdBy"/>
                <la:hidden property="createdTime"/>
                <div class="row">

        then:
        0 * delegate.completed("testId", testCompleteEvent)
    }

    TestDescriptorInternal descriptor(String id) {
        def desc = Mock(TestDescriptorInternal)
        _ * desc.getId() >> id
        desc
    }

    TestStartEvent startEvent(String parentId) {
        def event = Mock(TestStartEvent)
        _ * event.getParentId() >> parentId

		// Test Case - 8.
		// Existing bucket, object name different from which NewMultipartUpload is constructed from.
		// Expecting "Invalid upload id".
		{bucketName: bucket, objName: "def", uploadID: "xyz", PartID: 1, expectedError: fmt.Errorf("%s", "Invalid upload id xyz")},
		// Test Case - 9.

        assertFalse(response.isShareDfs());
    }

    @Test
    @DisplayName("Should return correct TID from TreeConnectResponse interface")
    void testGetTid() throws Exception {
        // Given - set tree ID using reflection
        Method setTreeIdMethod = ServerMessageBlock2.class.getDeclaredMethod("setTreeId", int.class);
        setTreeIdMethod.setAccessible(true);
        setTreeIdMethod.invoke(response, 12345);