## 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")
```

    /**
     * Determines whether specified activation method is present in configuration or not. It should help to have AND
     * between activation conditions
     * Need for solving https://issues.apache.org/jira/browse/MNG-4565
     * @param profile The profile whose activation status should be determined, must not be {@code null}.

import java.io.IOException;
import java.io.StringReader;
import java.io.Writer;
import java.util.EnumSet;

/**
 * Tests for the default implementations of {@code CharSink} methods.
 *
 * @author Colin Decker
 */
public class CharSinkTest extends IoTestCase {

  private static final String STRING = ASCII + I18N;

  private TestCharSink sink;

  @Override
  public void setUp() {

 *
 * <p>{@link RecursiveDeleteOption#ALLOW_INSECURE} can be used to force the recursive delete method
 * to proceed anyway.
 *
 * @since NEXT (but since 21.0 in the JRE flavor)
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@J2ObjCIncompatible // java.nio.file
@ElementTypesAreNonnullByDefault
// Users are unlikely to use this unless they're already interacting with MoreFiles and Path.

/**
 * Options for use with recursive delete methods ({@link MoreFiles#deleteRecursively} and {@link
 * MoreFiles#deleteDirectoryContents}).
 *
 * @since NEXT (but since 21.0 in the JRE flavor)
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@J2ObjCIncompatible // java.nio.file
@ElementTypesAreNonnullByDefault
public enum RecursiveDeleteOption {
  /**

/**
 * Options for use with recursive delete methods ({@link MoreFiles#deleteRecursively} and {@link
 * MoreFiles#deleteDirectoryContents}).
 *
 * @since 21.0 (but only since 33.4.0 in the Android flavor)
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@J2ObjCIncompatible // java.nio.file
@ElementTypesAreNonnullByDefault
public enum RecursiveDeleteOption {
  /**

 *       typically implemented by opening a stream using one of the methods in the first category,
 *       doing something and finally closing the stream or channel that was opened.
 * </ul>
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class ByteSink {

  /** Constructor for use by subclasses. */
  protected ByteSink() {}

  /**

 * character encoding} using {@link ByteSink#asCharSink(Charset)}. Characters written to the
 * resulting {@code CharSink} will written to the {@code ByteSink} as encoded bytes.
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class CharSink {

  /** Constructor for use by subclasses. */
  protected CharSink() {}

  /**

You can define dependencies that in turn can define dependencies themselves.

In the end, a hierarchical tree of dependencies is built, and the **Dependency Injection** system takes care of solving all these dependencies for you (and their sub-dependencies) and providing (injecting) the results at each step.

For example, let's say you have 4 API endpoints (*path operations*):

* `/items/public/`

import java.util.EnumSet;
import java.util.List;
import java.util.stream.Stream;
import junit.framework.TestSuite;

/**
 * Tests for the default implementations of {@code CharSource} methods.
 *
 * @author Colin Decker
 */
public class CharSourceTest extends IoTestCase {

  @AndroidIncompatible // Android doesn't understand suites whose tests lack default constructors.
  public static TestSuite suite() {