* Data validation
* Automatic documentation

## Defaults { #defaults }

As query parameters are not a fixed part of a path, they can be optional and can have default values.

In the example above they have default values of `skip=0` and `limit=10`.

So, going to the URL:

```
http://127.0.0.1:8000/items/
```

* `allow_methods` - A list of HTTP methods that should be allowed for cross-origin requests. Defaults to `['GET']`. You can use `['*']` to allow all standard methods.

///

## Overriding the defaults { #overriding-the-defaults }

Using the information above, you can use the same utility function to generate the OpenAPI schema and override each part that you need.

    checkArgument(type != implementation, "Don't register %s to itself!", type);
    checkArgument(
        !DEFAULTS.containsKey(type), "A default value was already registered for %s", type);
    checkArgument(
        implementations.put(type, implementation) == null,
        "Implementation for %s was already registered",
        type);
  }

  static {
    setImplementation(Appendable.class, StringBuilder.class);

        // Test that "yes" string defaults to false (not a valid boolean)
        Map<String, Object> properties = Map.of(Constants.MAVEN_DEPLOY_BUILD_POM, "yes");
        assertFalse(Features.deployBuildPom(properties));
    }

    @Test
    void testDeployBuildPomWithNumericString() {
        // Test that numeric string defaults to false

options - Your custom options to override the ones defined in [Defaults](#defaults)\n   * @return {Object} instance - The generated Popper.js instance\n   */\n  constructor(reference, popper, options = {}) {\n    // make update() debounced, so that it only runs at most once-per-tick\n    this.update = debounce(this.update.bind(this));\n\n    // with {} we create a new object with the options inside it\n    this.options = { ...Popper.Defaults, ...options };\n\n    // init state\n    this.state = {\n ...

     * Interpolates the values in the given map using the provided callback function.
     * This method defaults to setting empty strings for unresolved placeholders.
     *
     * @param properties The map containing key-value pairs to be interpolated.
     * @param callback The function to resolve variable values not found in the map.
     */
    default void interpolate(@Nonnull Map<String, String> properties, @Nullable UnaryOperator<String> callback) {

     * The default value is {@code "main"}.
     *
     * @see ProjectScope#MAIN
     */
    default ProjectScope scope() {
        return ProjectScope.MAIN;
    }

    /**
     * {@return the language of the source files}.
     * The default value is {@code "java"}.
     *
     * @see Language#JAVA_FAMILY
     */
    default Language language() {

    /** Whether to convert DFS paths to FQDN */
    protected boolean dfsConvertToFqdn;
    /** Default logon share */
    protected String logonShare;
    /** Default domain for authentication */
    protected String defaultDomain;
    /** Default username for authentication */
    protected String defaultUserName;
    /** Default password for authentication */
    protected String defaultPassword;
    /** NetBIOS hostname */

                setDefaultProperties();
            }
        } catch (IOException e) {
            logger.warn("Failed to load system.properties, using defaults", e);
            setDefaultProperties();
        }
    }

    private void setDefaultProperties() {
        // Set default test properties
        setProperty("fess.version", "99.99.99");
    }