var and And
				if err = d.DecodeElement(&and, &se); err != nil {
					return err
				}
				f.And = and
				f.andSet = true
			case "Tag":
				var tag Tag
				if err = d.DecodeElement(&tag, &se); err != nil {
					return err
				}
				f.Tag = tag
				f.tagSet = true
			case "ObjectSizeLessThan":
				var sz int64
				if err = d.DecodeElement(&sz, &se); err != nil {
					return err
				}

        .url("https://square.com")
        .tag(tag as Any)
        .build()
    assertThat(request.tag<Any>()).isSameAs(tag)
    assertThat(request.tag(Any::class)).isSameAs(tag)
    assertThat(request.tag(String::class)).isNull()

    // Alternate access APIs also work.
    assertThat(request.tag<Any>()).isSameAs(tag)
    assertThat(request.tag(Any::class)).isSameAs(tag)
  }

  @Test
  fun nullRemovesTag() {

	GOPATH = ""

	// GOROOT - GOROOT value at the time of build.
	GOROOT = ""

	// Version - version time.RFC3339.
	Version = "DEVELOPMENT.GOGET"

	// ReleaseTag - release tag in TAG.%Y-%m-%dT%H-%M-%SZ.
	ReleaseTag = "DEVELOPMENT.GOGET"

	// CommitID - latest commit id.
	CommitID = "DEVELOPMENT.GOGET"

	// ShortCommitID - first 12 characters from CommitID.
	ShortCommitID = "DEVELOPMENT.GOGET"

      .url(HttpUrl.get("https://square.com/"))
      .tag(Integer.class, 5)
      .tag(String.class, "hello")
      .build();
    Call call = client.newCall(request);

    assertEquals(5, call.tag(Integer.class));
    assertEquals("hello", call.tag(String.class));
    assertEquals(null, call.tag(Boolean.class));
    assertEquals(null, call.tag(Object.class));
  }

  @Test
  public void tagsCanBeComputed() {

        // Tag [3]
        byte[] tokenTag3 = buildInitToken(new ASN1ObjectIdentifier[] { OID_KRB }, null, null, mic, false, null, null, null);
        NegTokenInit p3 = new NegTokenInit(tokenTag3);
        assertArrayEquals(mic, p3.getMechanismListMIC(), "MIC should be parsed from tag [3]");
    }

    @Test
    @DisplayName("Tag [3] MIC with non-OctetString is ignored (no crash)")

  /**
   * Returns the tag attached with [type] as a key, or null if no tag is attached with that key.
   *
   * The tags on a call are seeded from the [request tags][Request.tag]. This set will grow if new
   * tags are computed.
   */
  fun <T : Any> tag(type: KClass<T>): T?

  /**
   * Returns the tag attached with [type] as a key, or null if no tag is attached with that key.
   *

func (r *ReqInfo) SetTags(key, val string) *ReqInfo {
	if r == nil {
		return nil
	}
	r.Lock()
	defer r.Unlock()
	// Search of tag key already exists in tags
	var updated bool
	for _, tag := range r.tags {
		if tag.Key == key {
			tag.Val = val
			updated = true
			break
		}
	}
	if !updated {
		// Append to the end of tags list
		r.tags = append(r.tags, KeyVal{key, val})
	}

        .tag(Integer::class, 5 as Integer)
        .tag(String::class, "hello")
        .build()
    val call = client.newCall(request)

    // Check the Kotlin-focused APIs.
    assertThat(call.tag(String::class)).isEqualTo("hello")
    assertThat(call.tag(Integer::class)).isEqualTo(5)
    assertThat(call.tag(Boolean::class)).isNull()
    assertThat(call.tag(Any::class)).isNull()

/**
 * Handles basic types that always use the same tag. This supports optional types and may set a type
 * hint for further adapters to process.
 *
 * Types like ANY and CHOICE that don't have a consistent tag cannot use this.
 */
internal data class BasicDerAdapter<T>(
  private val name: String,
  /** The tag class this adapter expects, or -1 to match any tag class. */
  val tagClass: Int,
  /** The tag this adapter expects, or -1 to match any tag. */

En este caso tendrás que asegurarte de que cada operation ID sea **único** de alguna otra manera.

Por ejemplo, podrías asegurarte de que cada *path operation* tenga un tag, y luego generar el operation ID basado en el **tag** y el **name** de la *path operation* (el nombre de la función).

### Función personalizada para generar ID único { #custom-generate-unique-id-function }