context, entry.getValue());
                    return gav != null
                            && Objects.equals(gav.groupId(), groupId)
                            && Objects.equals(gav.artifactId(), artifactId)
                            && (version == null || Objects.equals(gav.version(), version));
                })
                .findFirst()
                .map(Map.Entry::getKey)

        val parts = header.split(':', limit = 2)
        if ("Content-Type".equals(parts[0], ignoreCase = true)) {
          return@let parts[1].trim()
        }
      }
      return@let null
    } ?: "application/x-www-form-urlencoded"

  return mimeType.toMediaTypeOrNull()
}

private fun isSpecialHeader(s: String): Boolean = s.equals("Content-Type", ignoreCase = true)

fun Main.commonRun() {
  client = createClient()

   * the same structural relationships as those in this graph.
   *
   * <p>Thus, two value graphs A and B are equal if <b>all</b> of the following are true:
   *
   * <ul>
   *   <li>A and B have equal {@link #isDirected() directedness}.
   *   <li>A and B have equal {@link #nodes() node sets}.
   *   <li>A and B have equal {@link #edges() edge sets}.
   *   <li>The {@link #edgeValue(N, N) value} of a given edge is the same in both A and B.

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }

            if (obj instanceof CacheKey that) {
                return Objects.equals(this.artifactId, that.artifactId)
                        && Objects.equals(this.groupId, that.groupId)
                        && Objects.equals(this.version, that.version)

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }

            if (!(obj instanceof CacheKey)) {
                return false;
            }

            CacheKey that = (CacheKey) obj;

            return artifactId.equals(that.artifactId) && groupId.equals(that.groupId) && version.equals(that.version);
        }

        @Override

   */
  protected boolean standardIsEmpty() {
    return !entrySet().iterator().hasNext();
  }

  /**
   * A sensible definition of {@link #equals} in terms of the {@code equals} method of {@link
   * #entrySet}. If you override {@link #entrySet}, you may wish to override {@link #equals} to
   * forward to this implementation.
   *
   * @since 7.0
   */
  protected boolean standardEquals(@Nullable Object object) {

    @ParametricNullness
    V rightValue();

    /**
     * Two instances are considered equal if their {@link #leftValue()} values are equal and their
     * {@link #rightValue()} values are also equal.
     */
    @Override
    boolean equals(@Nullable Object other);

    /**
     * The hash code equals the value {@code Arrays.asList(leftValue(), rightValue()).hashCode()}.
     */
    @Override

    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        DefaultArtifact that = (DefaultArtifact) o;
        return Objects.equals(groupId, that.groupId)
                && Objects.equals(artifactId, that.artifactId)

            if (other.value1 != null) {
                return false;
            }
        } else if (!value1.equals(other.value1)) {
            return false;
        }
        if (value2 == null) {
            if (other.value2 != null) {
                return false;
            }
        } else if (!value2.equals(other.value2)) {
            return false;
        }
        if (value3 == null) {

            throws ArtifactMetadataRetrievalException {
        Set<Artifact> dependencies = new HashSet<>();

        if ("g".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {
                a = factory.createBuildArtifact("org.apache.maven", "h", "1.0", "jar");
                dependencies.add(a);