Capability descriptor = capabilityNotationParser.parseNotation(notation);
                capabilities.add(descriptor);
            }
        } else {
            throw new InvalidUserCodeException("Cannot declare capability '" + notation + "' after dependency " + displayName + " has been resolved");
        }
    }

    @Override
    public Collection<? extends Capability> getCapabilities() {

Apart from all the fancy words used here, the **Dependency Injection** system is quite simple.

Just functions that look the same as the *path operation functions*.

But still, it is very powerful, and allows you to declare arbitrarily deeply nested dependency "graphs" (trees).

!!! tip
    All this might not seem as useful with these simple examples.

    But you will see how useful it is in the chapters about **security**.

And it's also used internally when mounting sub-applications.

## Proxy with a stripped path prefix

Having a proxy with a stripped path prefix, in this case, means that you could declare a path at `/app` in your code, but then, you add a layer on top (the proxy) that would put your **FastAPI** application under a path like `/api/v1`.

In this case, the original path `/app` would actually be served at `/api/v1/app`.

	// doubt that splice(2) could help non-streams, cuz they usually send small frames respectively
	// and one splice call would result in one frame.
	// splice(2) is suitable for large data but the generation of fragments defeats its edge here.
	// Therefore, don't bother to try splice if the r is not a streaming descriptor.
	if pfd == nil || !pfd.IsStream {
		return
	}

	written, handled, err = pollSplice(&f.pfd, pfd, remain)

import org.codelibs.fess.crawler.service.impl.UrlFilterServiceImpl;
import org.codelibs.fess.crawler.util.CrawlerWebServer;
import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * @author shinsuke
 *
 */
public class HcHttpClientTest extends PlainTestCase {
    public HcHttpClient httpClient;

    public UrlFilter urlFilter;

    @Override

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

If you are using third party libraries that tell you to call them with `await`, like:

```Python
results = await some_library()
```

Then, declare your *path operation functions* with `async def` like:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

!!! note

	})

	if recvPar != nil {
		// recv parameter list present (may be empty)
		// spec: "The receiver is specified via an extra parameter section preceding the
		// method name. That parameter section must declare a single parameter, the receiver."
		var recv *Var
		switch len(recvList) {
		case 0:
			// error reported by resolver
			recv = NewParam(nopos, nil, "", Typ[Invalid]) // ignore recv below
		default:

    ```

!!! info "Informação"
    `Body` também possui todas as validações adicionais e metadados de parâmetros como em `Query`,`Path` e outras que você verá depois.

## Declare um único parâmetro de corpo indicando sua chave

Suponha que você tem um único parâmetro de corpo `item`, a partir de um modelo Pydantic `Item`.

Por padrão, o **FastAPI** esperará que seu conteúdo venha no corpo diretamente.

        when:
        run 'tasks', '-refresh-dependencies'

        then:
        "should fail in a consistent way as with '--refresh-dependencies'"
    }

    def "cannot declare option for task dependency of another task"() {
        given:
        buildFile << """
            apply plugin: 'java'
        """

        when:
        runAndFail 'check', '--tests', 'abc'

[[custom_dependencies_blocks]]
== Using a custom `dependencies` block

NOTE: Custom `dependencies` blocks are based on incubating APIs.

A plugin can provide dependency declarations in custom blocks that allow users to declare dependencies in a type-safe and context-aware way.