PrefixEnabledFn func(prefix string) bool // function which returns true if versioning is enabled on prefix

	// IndexCB will return any index created but the compression.
	// Object must have been read at this point.
	IndexCB func() []byte

	// InclFreeVersions indicates that free versions need to be included
	// when looking up a version by fi.VersionID
	InclFreeVersions bool

Let's take this application as example:

{* ../../docs_src/query_params_str_validations/tutorial001_py310.py hl[7] *}

The query parameter `q` is of type `str | None`, that means that it's of type `str` but could also be `None`, and indeed, the default value is `None`, so FastAPI will know it's not required.

/// note

FastAPI will know that the value of `q` is not required because of the default value `= None`.

                final String userAgent = searchLog.getUserAgent();
                final boolean isBot =
                        userAgent != null && stream(botNames).get(stream -> stream.anyMatch(botName -> userAgent.indexOf(botName) >= 0));
                if (!isBot) {
                    searchLog.getUserInfo().ifPresent(userInfo -> {
                        final String code = userInfo.getId();

    fun edit(): Editor? = ******@****.***(key, sequenceNumber)

    /** Returns the unbuffered stream with the value for [index]. */
    fun getSource(index: Int): Source = sources[index]

    /** Returns the byte length of the value for [index]. */
    fun getLength(index: Int): Long = lengths[index]

    override fun close() {
      for (source in sources) {
        source.closeQuietly()
      }
    }
  }

/**
 * Form class for creating protected words dictionary entries.
 * Protected words are terms that should not be modified or analyzed during
 * text processing, preserving their original form in search indexes.
 *
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
        // Default constructor
    }

    /** Dictionary identifier */

gnedSlot||e.parentNode||(o(e)?e.host:null)||d(e)}function x(e){return["html","body","#document"].indexOf(l(e))>=0?e.ownerDocument.body:r(e)&&v(e)?e:x(b(e))}function w(e,n){var r;void 0===n&&(n=[]);var o=x(e),i=o===(null==(r=e.ownerDocument)?void 0:r.body),a=t(o),s=i?[a].concat(a.visualViewport||[],v(o)?o:[]):o,f=n.concat(s);return i?f:f.concat(w(b(s)))}function O(e){return["table","td","th"].indexOf(l(e))>=0}function j(e){return r(e)&&"fixed"!==m(e).position?e.offsetParent:null}function E(e){for(var...

    // Search for misses.
    assertEquals(-1, binarySearch(0, 6) { index -> 0.compareTo(table[index]) })
    assertEquals(-2, binarySearch(0, 6) { index -> 2.compareTo(table[index]) })
    assertEquals(-3, binarySearch(0, 6) { index -> 4.compareTo(table[index]) })
    assertEquals(-4, binarySearch(0, 6) { index -> 6.compareTo(table[index]) })
    assertEquals(-5, binarySearch(0, 6) { index -> 8.compareTo(table[index]) })

     * @return The file type helper.
     */
    public static FileTypeHelper getFileTypeHelper() {
        return getComponent(FILE_TYPE_HELPER);
    }

    /**
     * Gets the index updater component.
     * @return The index updater.
     */
    public static IndexUpdater getIndexUpdater() {
        return getComponent(INDEX_UPDATER);
    }

    /**
     * Gets the key match helper component.

        return index;
    }

    /**
     * Sets the current index position in the buffer.
     *
     * @param index the new index position
     */
    public void setIndex(final int index) {
        this.index = index;
    }

    /**
     * Returns the capacity of the buffer.
     *
     * @return the buffer capacity
     */
    public int getCapacity() {
        return buf.length - start;

(function(o){var n='';-1!==['width','height','top','right','bottom','left'].indexOf(o)&&Y(t[o])&&(n='px'),e.style[o]=t[o]+n})}function j(e,t){Object.keys(t).forEach(function(o){var n=t[o];!1===n?e.removeAttribute(o):e.setAttribute(o,t[o])})}function q(e,t){var o=e.offsets,n=o.popper,i=o.reference,r=$,p=function(e){return e},s=r(i.width),d=r(n.width),a=-1!==['left','right'].indexOf(e.placement),l=-1!==e.placement.indexOf('-'),f=t?a||l||s%2==d%2?r:Z:p,m=t?r:p;return{left:f(1==s%2&&1==d%2&&!l&&t?n....