cos.write(new byte[] { 0, 1, 2, 3, 4 });
        assertFalse(cos.done);
        assertTrue(cos.isInMemory());
        cos.close();
        assertFalse(cos.done);
    }

    @Test
    public void inFile() throws IOException {
        ContentOutputStream cos = new ContentOutputStream(10, Curl.tmpDir);
        cos.write(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 });
        assertFalse(cos.done);

You can use `async def` or normal `def`.

And you can declare dependencies with `async def` inside of normal `def` *path operation functions*, or `def` dependencies inside of `async def` *path operation functions*, etc.

It doesn't matter. **FastAPI** will know what to do.

/// note

///

## Create a Project { #create-a-project }

First, create a directory for your project.

What I normally do is that I create a directory named `code` inside my home/user directory.

And inside of that I create one directory per project.

<div class="termy">

```console
// Go to the home directory
$ cd
// Create a directory for all your code projects
$ mkdir code

        o -> orElseNull(o), Comparator.nullsLast(valueComparator));
  }

  @IgnoreJRERequirement // helper for emptiesFirst+emptiesLast
  /*
   * If we make these calls inline inside the lambda inside emptiesFirst()/emptiesLast(), we get an
   * Animal Sniffer error, despite the @IgnoreJRERequirement annotation there. For details, see
   * ImmutableSortedMultiset.
   */

      return inline.invokeAll(tasks, timeout, unit);
    }

    // Define the invokeAny methods to invoke the first task
    @Override
    public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
        throws ExecutionException, InterruptedException {
      assertTaskWrapped(tasks);
      lastMethodCalled = "invokeAny";
      return inline.submit(Iterables.get(tasks, 0)).get();
    }

```

### More technical details { #more-technical-details }

You might have noticed that `await` can only be used inside of functions defined with `async def`.

But at the same time, functions defined with `async def` have to be "awaited". So, functions with `async def` can only be called inside of functions defined with `async def` too.

So, about the egg and the chicken, how do you call the first `async` function?

      return inline.invokeAll(tasks, timeout, unit);
    }

    // Define the invokeAny methods to invoke the first task
    @Override
    public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
        throws ExecutionException, InterruptedException {
      assertTaskWrapped(tasks);
      lastMethodCalled = "invokeAny";
      return inline.submit(Iterables.get(tasks, 0)).get();
    }

                                            key="labels.web_api_json_enabled"/></span>
                                    <div class="form-inline col-sm-9">
                                        <la:errors property="webApiJson"/>
                                        <div class="form-check">

        assertEquals("BoostQuery", boostQueryCommand.getQueryClassName());
    }

    @Test
    public void test_execute_withTermQuery() {
        // Test executing BoostQuery with a TermQuery inside
        Term term = new Term("field", "value");
        TermQuery termQuery = new TermQuery(term);
        BoostQuery boostQuery = new BoostQuery(termQuery, 2.5f);

## ty

If ty is available, use it to check types.

## Asyncer

When needing to run blocking code inside of async functions, or async code inside of blocking functions, suggest using Asyncer.

Prefer it over AnyIO or asyncio.

Install:

```bash
uv add asyncer
```

Run blocking sync code inside of async with `asyncify()`:

```python
from asyncer import asyncify
from fastapi import FastAPI