* NetworkBuilder}.
 *
 * <p>This class maintains a map of nodes to {@link NetworkConnections}. This class also maintains a
 * map of edges to reference nodes. The reference node is defined to be the edge's source node on
 * directed graphs, and an arbitrary endpoint of the edge on undirected graphs.
 *
 * <p>Collection-returning accessors return unmodifiable views: the view returned will reflect

/// note | Technical Details

You could also use `from starlette.websockets import WebSocket`.

**FastAPI** provides the same `WebSocket` directly just as a convenience for you, the developer. But it comes directly from Starlette.

///

## Await for messages and send messages { #await-for-messages-and-send-messages }

In your WebSocket route you can `await` for messages and send messages.

@GwtIncompatible
@J2ktIncompatible
public class ServiceTest extends TestCase {

  /** Assert on the comparison ordering of the State enum since we guarantee it. */
  public void testStateOrdering() {
    // List every valid (direct) state transition.
    assertLessThan(NEW, STARTING);
    assertLessThan(NEW, TERMINATED);

    assertLessThan(STARTING, RUNNING);
    assertLessThan(STARTING, STOPPING);
    assertLessThan(STARTING, FAILED);

cases section below.

To access a struct, union, or enum type directly, prefix it with
struct_, union_, or enum_, as in C.struct_stat. The size of any C type
T is available as C.sizeof_T, as in C.sizeof_struct_stat. These
special prefixes means that there is no way to directly reference a C
identifier that starts with "struct_", "union_", "enum_", or

# `FastAPI` class

Here's the reference information for the `FastAPI` class, with all its parameters, attributes and methods.

You can import the `FastAPI` class directly from `fastapi`:

```python
from fastapi import FastAPI
```

::: fastapi.FastAPI
    options:
        members:
            - openapi_version
            - webhooks
            - state
            - dependency_overrides
            - openapi

You can use:

* `HTTPException`
* `WebSocketException`

These exceptions can be imported directly from `fastapi`:

```python
from fastapi import HTTPException, WebSocketException
```

::: fastapi.HTTPException

/**
 * A generic JUnit test which tests {@code spliterator} operations on a collection. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.

FastAPI 會使用那個暫時性的回應來擷取標頭（還有 Cookie 與狀態碼），並把它們放到最終回應中；最終回應包含你回傳的值，且會依任何 `response_model` 進行過濾。

你也可以在依賴中宣告 `Response` 參數，並在其中設定標頭（與 Cookie）。

## 直接回傳 `Response` { #return-a-response-directly }

當你直接回傳 `Response` 時，也能加入標頭。

依照[直接回傳 Response](response-directly.md)中的說明建立回應，並把標頭作為額外參數傳入：

{* ../../docs_src/response_headers/tutorial001_py310.py hl[10:12] *}

/// note | 技術細節

    /**
     * Create new RDMA negotiation response
     */
    public RdmaNegotiateResponse() {
        // Initialize with default values
        this.status = 0; // Success
        this.selectedVersion = 0x0100; // SMB Direct 1.0
        this.creditsGranted = 0;
        this.maxReceiveSize = RdmaCapabilities.DEFAULT_MAX_RECEIVE_SIZE;
        this.maxReadWriteSize = RdmaCapabilities.DEFAULT_MAX_READ_WRITE_SIZE;

        GOMODCACHE="/Users/gopher/go/pkg/mod"
        GONOPROXY=""
        GONOSUMDB=""
        GOOS="darwin"
        GOPATH="/Users/gopher/go"
        GOPRIVATE=""
        GOPROXY="https://proxy.golang.org,direct"
        GOROOT="/usr/local/go"
        GOSUMDB="sum.golang.org"
        GOTMPDIR=""
        GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64"
        GOVCS=""
        GOVERSION="go1.20.7"
        GCCGO="gccgo"