# Classes as Dependencies

Before diving deeper into the **Dependency Injection** system, let's upgrade the previous example.

## A `dict` from the previous example

In the previous example, we were returning a `dict` from our dependency ("dependable"):

=== "Python 3.10+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/dependencies/tutorial001_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="11"

        assertStateStored()
        result.assertTasksExecuted(":compileJava", ":processResources", ":classes", ":jar", ":compileTestJava", ":processTestResources", ":testClasses", ":test", ":assemble", ":check", ":build")
        def classFile = file("build/classes/java/main/Thing.class")
        classFile.isFile()
        def testClassFile = file("build/classes/java/test/ThingTest.class")
        testClassFile.isFile()

		measurements. Compare only with other /cpu/classes metrics.

	/cpu/classes/gc/total:cpu-seconds
		Estimated total CPU time spent performing GC tasks. This metric
		is an overestimate, and not directly comparable to system CPU
		time measurements. Compare only with other /cpu/classes metrics.
		Sum of all metrics in /cpu/classes/gc.

	/cpu/classes/idle:cpu-seconds
		Estimated total available CPU time not spent executing

        List<Path> classes = dispatched.get(JavaPathType.CLASSES);
        List<Path> modules = dispatched.get(JavaPathType.MODULES);
        List<Path> unresolved = dispatched.get(PathType.UNRESOLVED);
        assertEquals(3, dispatched.size());
        assertEquals(1, unresolved.size());
        assertEquals(8, classes.size()); // "plexus.pom" and "junit.jar" are excluded.

     * declared in the given [KaSymbolWithMembers].
     *
     * It is worth noting that, while Java classes may contain declarations of static callables freely, in Kotlin only enum classes define
     * static callables. Hence, for non-enum Kotlin classes, it is not expected that the static declared member scope will contain any

				out.kind = metricKindUint64
				out.scalar = uint64(NumCgoCall())
			},
		},
		"/cpu/classes/gc/mark/assist:cpu-seconds": {
			deps: makeStatDepSet(cpuStatsDep),
			compute: func(in *statAggregate, out *metricValue) {
				out.kind = metricKindFloat64
				out.scalar = float64bits(nsToSec(in.cpuStats.GCAssistTime))
			},
		},
		"/cpu/classes/gc/mark/dedicated:cpu-seconds": {
			deps: makeStatDepSet(cpuStatsDep),

 * }
 * </pre>
 *
 * <p>please use {@link ClassSanityTester#forAllPublicStaticMethods}.
 *
 * <p>If not all classes on the classpath should be covered, {@link #ignoreClasses} can be used to
 * exclude certain classes. As a special case, classes with an underscore in the name (like {@code
 * AutoValue_Foo}) can be excluded using <code>ignoreClasses({@link #UNDERSCORE_IN_NAME})</code>.
 *

	}

	names := []string{
		"/cpu/classes/idle:cpu-seconds",

		"/cpu/classes/gc/mark/assist:cpu-seconds",
		"/cpu/classes/gc/mark/dedicated:cpu-seconds",
		"/cpu/classes/gc/mark/idle:cpu-seconds",
		"/cpu/classes/gc/pause:cpu-seconds",
		"/cpu/classes/gc/total:cpu-seconds",
		"/cpu/classes/scavenge/assist:cpu-seconds",
		"/cpu/classes/scavenge/background:cpu-seconds",
		"/cpu/classes/scavenge/total:cpu-seconds",

        file("build/classes/java/main/example/module-info.class").exists()
        file("build/classes/java/main/example/io/example/Example.class").exists()
        file("build/classes/java/main/another/module-info.class").exists()
        file("build/classes/java/main/another/io/another/BaseExample.class").exists()
        !file("build/classes/java/main/ignored/module-info.class").exists()

 * }
 * </pre>
 *
 * <p>please use {@link ClassSanityTester#forAllPublicStaticMethods}.
 *
 * <p>If not all classes on the classpath should be covered, {@link #ignoreClasses} can be used to
 * exclude certain classes. As a special case, classes with an underscore in the name (like {@code
 * AutoValue_Foo}) can be excluded using <code>ignoreClasses({@link #UNDERSCORE_IN_NAME})</code>.
 *