"""
        buildFile << """
            plugins {
                id 'java-library'
            }

            group = 'org.gradle.lib'
            version = '1.0'

            task checkDeps {
                def runtimeClasspath = configurations.runtimeClasspath
                doLast {
                    println("Resolved: \${runtimeClasspath.files.name.join(', ')}")
                }
            }

import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Set;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * An immutable sorted set with one or more elements. TODO(jlevy): Consider separate class for a
 * single-element sorted set.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 */

		}
		netLimitSem <- struct{}{}
		hasToken = true
	}

	checker := new(netTokenChecker)
	runtime.SetFinalizer(checker, (*netTokenChecker).panicUnreleased)

	return func() {
		if checker.released {
			panic("internal error: net token released twice")
		}
		checker.released = true
		if hasToken {
			<-netLimitSem
		}
		runtime.SetFinalizer(checker, nil)
	}, nil
}

var (
	netLimitOnce sync.Once

        when:
        resolveLocalPath()
        run ':m1:checkDeps'

        then:
        expectResolvedToLocal(resolveLocal)

        when:
        resolvePublishedPath()
        run ':m1:checkDeps'

        then:
        expectResolveToPublished(resolvePublished)
    }

            'org:test:1.0'()
        }

        when:
        repositoryInteractions {
            'org:test:1.0' {
                expectGetMetadata()
            }
        }
        fails ':checkDeps'

        then:
        failure.assertHasCause("Could not resolve org:test:1.0: Resolution strategy disallows usage of changing versions")
    }

    def "fails to resolve a transitive changing dependency"() {

## Use the instance as a dependency

Then, we could use this `checker` in a `Depends(checker)`, instead of `Depends(FixedContentQueryChecker)`, because the dependency is the instance, `checker`, not the class itself.

And when solving the dependency, **FastAPI** will call this `checker` like:

```Python
checker(q="somequery")
```

```Python hl_lines="16"
{!../../../docs_src/dependencies/tutorial011.py!}
```

这样就可以**参数化**依赖项，它包含 `checker.fixed_content` 的属性 - `"bar"`。

## 把实例作为依赖项

然后，不要再在 `Depends(checker)` 中使用 `Depends(FixedContentQueryChecker)`， 而是要使用 `checker`，因为依赖项是类实例 - `checker`，不是类。

处理依赖项时，**FastAPI** 以如下方式调用 `checker`：

```Python
checker(q="somequery")
```

……并用*路径操作函数*的参数 `fixed_content_included` 返回依赖项的值：

```Python hl_lines="20"

        expect:
        // have to run twice to trigger the failure, to parse the descriptor from the cache
        succeeds ":checkDeps"
        resolve.expectGraph {
            root(":", ":test:") {
                module("group:artifact:1.0")
            }
        }

        succeeds ":checkDeps"
        resolve.expectGraph {
            root(":", ":test:") {
                module("group:artifact:1.0")
            }

    lockedConf('org:foo') {
        version { strictly '1.1' }
    }
}
"""

        lockfileFixture.createLockfile('lockedConf',['org:foo:1.0'], unique)

        when:
        fails 'checkDeps'

        then:
        failure.assertHasCause """Cannot find a version of 'org:foo' that satisfies the version constraints:
   Dependency path ':depLock:unspecified' --> 'org:foo:1.+'

          "version": {
            "requires": "${jsr305.version}"
          }
        },
        {
          "group": "org.checkerframework",
          "module": "checker-qual",
          "version": {
            "requires": "${checker.version}"
          }
        },
        {
          "group": "com.google.errorprone",
          "module": "error_prone_annotations",
          "version": {