@Override
    public boolean isWarnEnabled() {
        return logger.isLoggable(Level.WARNING);
    }

    @Override
    public void warn(final String message) {
        logger.logp(Level.WARNING, sourceClass, null, message);
    }

    @Override
    public void warn(final String message, final Throwable t) {
        logger.logp(Level.WARNING, sourceClass, null, message, t);
    }

    @Override

    }

    /**
     * Logs a warning message without an associated exception.
     *
     * @param message the warning message to be logged
     */
    default void warn(@Nonnull String message) {
        log(Level.WARN, message);
    }

    /**
     * Logs a warning message with an associated exception.
     *
     * @param message the warning message to be logged

You can declare extra information in `Field`, `Query`, `Body`, etc. And it will be included in the generated JSON Schema.

You will learn more about adding extra information later in the docs, when learning to declare examples.

/// warning

Extra keys passed to `Field` will also be present in the resulting OpenAPI schema for your application.

ol-file.is-warning~.warning-feedback,.form-control-file.is-warning~.warning-tooltip{display:block}.form-check-input.is-warning~.form-check-label{color:#ffc107}.form-check-input.is-warning~.warning-feedback,.form-check-input.is-warning~.warning-tooltip{display:block}.custom-control-input.is-warning~.custom-control-label{color:#ffc107}.custom-control-input.is-warning~.custom-control-label::before{border-color:#ffc107}.custom-control-input.is-warning~.warning-feedback,.custom-control-input.is-warni...

        collector.setSource("pom.xml");
        collector.add(Problem.Severity.ERROR, "Error message", 10, 5, null);
        collector.add(Problem.Severity.WARNING, "Warning message", 15, 3, null);

        List<Problem> problems = collector.getProblems();
        assertEquals(2, problems.size(), "Should collect both problems");

package org.apache.maven.artifact.resolver;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.versioning.VersionRange;
import org.codehaus.plexus.logging.Logger;

/**
 * Send resolution warning events to the warning log.
 *
 */
@Deprecated
public class WarningResolutionListener implements ResolutionListener {
    private Logger logger;

    public WarningResolutionListener(Logger logger) {

## 🗄 `Field`

🥇, 👆 ✔️ 🗄 ⚫️:

{* ../../docs_src/body_fields/tutorial001.py hl[4] *}

/// warning

👀 👈 `Field` 🗄 🔗 ⚪️➡️ `pydantic`, 🚫 ⚪️➡️ `fastapi` 🌐 🎂 (`Query`, `Path`, `Body`, ♒️).

///

## 📣 🏷 🔢

👆 💪 ⤴️ ⚙️ `Field` ⏮️ 🏷 🔢:

{* ../../docs_src/body_fields/tutorial001.py hl[11:14] *}

        } else if (platformSystemProperty == JDK8_ALPN_PROPERTY) {
          if (!isAlpnBootEnabled()) {
            System.err.println("Warning: ALPN Boot not enabled")
          }
        } else if (platformSystemProperty == JDK8_PROPERTY) {
          if (isAlpnBootEnabled()) {
            System.err.println("Warning: ALPN Boot enabled unintentionally")
          }

        if (ageMillis + minFreshMillis >= freshMillis) {
          builder.addHeader("Warning", "110 HttpURLConnection \"Response is stale\"")
        }
        val oneDayMillis = 24 * 60 * 60 * 1000L
        if (ageMillis > oneDayMillis && isFreshnessLifetimeHeuristic()) {
          builder.addHeader("Warning", "113 HttpURLConnection \"Heuristic expiration\"")
        }
        return CacheStrategy(null, builder.build())

 * methods to modify the behavior of the backing set as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingSet} forward <b>indiscriminately</b> to the
 * methods of the delegate. For example, overriding {@link #add} alone <b>will not</b> change the