{* ../../docs_src/body_nested_models/tutorial002_py310.py hl[12] *}

## Set types { #set-types }

But then we think about it, and realize that tags shouldn't repeat, they would probably be unique strings.

And Python has a special data type for sets of unique items, the `set`.

Then we can declare `tags` as a set of strings:

{* ../../docs_src/body_nested_models/tutorial003_py310.py hl[12] *}

     */
    void mergeDuplicates(Model model, ModelBuildingRequest request, ModelProblemCollector problems);

    /**
     * Sets default values in the specified model that for technical reasons cannot be set directly in the Modello
     * definition.
     *
     * @param model The model in which to set the default values, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.

     *
     * @see org.codelibs.fess.crawler.entity.Sitemap#getLoc()
     */
    @Override
    public String getLoc() {
        return loc;
    }

    /**
     * Sets the location of the sitemap.
     * @param loc the location URL to set
     */
    public void setLoc(final String loc) {
        this.loc = loc;
    }

    /*
     * (non-Javadoc)
     *

     * Gets the negotiation result code
     * @return the result code
     */
    public int getResult() {
        return this.result;
    }

    /**
     * Sets the negotiation result code
     * @param result the result code to set
     */
    public void setResult(final int result) {
        this.result = result;
    }

    /**
     * Gets the selected authentication mechanism OID

     */
    public void unsetFlag(final int flag) {
        flags &= ~flag;
    }

    /**
     * Sets a specific flag
     * @param flag the flag to set
     */
    public void setFlag(final int flag) {
        flags |= flag;
    }

    /**
     * Get the result of the DCERPC call.
     * @return result exception if the call failed, null otherwise
     */
    public DcerpcException getResult() {

     *
     * @param cause the cause
     */
    public CrawlingAccessException(final Throwable cause) {
        super(cause);
    }

    /**
     * Sets the log level for this exception.
     *
     * @param logLevel the log level to set
     */
    public void setLogLevel(final String logLevel) {
        this.logLevel = logLevel;
    }

    /**
     * Checks if the log level is DEBUG.
     *

			req.Header.Set("X-Amz-Copy-Source-If-Unmodified-Since", testCase.copyUnmodifiedHeader)
		}
		// Add custom metadata.
		for k, v := range testCase.metadata {
			req.Header.Set(k, v)
		}
		if testCase.metadataReplace {
			req.Header.Set("X-Amz-Metadata-Directive", "REPLACE")
		}
		if testCase.metadataCopy {
			req.Header.Set("X-Amz-Metadata-Directive", "COPY")
		}
		if testCase.metadataGarbage {

		v, ok = r.Header[xhttp.AmzContentSha256]
	}

	// Skip if no header was set.
	if !ok {
		return true
	}

	// If x-amz-content-sha256 is set and the value is not
	// 'UNSIGNED-PAYLOAD' we should validate the content sha256.
	switch v[0] {
	case unsignedPayload, unsignedPayloadTrailer:
		return true
	case emptySHA256:
		// some broken clients set empty-sha256
		// with > 0 content-length in the body,

        && hashCode() != object.hashCode()) {
      return false;
    }
    return Sets.equalsImpl(this, object);
  }

  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(this);
  }

  // This declaration is needed to make Set.iterator() and
  // ImmutableCollection.iterator() consistent.
  @Override
  public abstract UnmodifiableIterator<E> iterator();

    }

    /**
     * Returns the name of the request header.
     * @return The name of the request header.
     */
    public String getName() {
        return name;
    }

    /**
     * Sets the name of the request header.
     * @param name The name of the request header.
     */
    public void setName(final String name) {
        this.name = name;
    }

    /**