if aec != ErrNone {
		return psv, aec
	}

	// Save signature.
	preSignV4Values.Signature, aec = parseSignature("Signature=" + query.Get(xhttp.AmzSignature))
	if aec != ErrNone {
		return psv, aec
	}

	// Return structured form of signature query string.
	return preSignV4Values, ErrNone
}

// Parses signature version '4' header of the following form.
//

			// validating the extraction/parsing of signature field.
			if !compareSignatureV4(testCase.expectedAuthField.Signature, parsedAuthField.Signature) {
				t.Errorf("Test %d: Parsed Signature field mismatch: Expected \"%s\", got \"%s\"", i+1, testCase.expectedAuthField.Signature, parsedAuthField.Signature)
			}

			// validating the extracted signed headers.

      androidSignature(rootProject.libs.signature.android.apilevel24) { artifact { type = "signature" } }
    } else {
      // Everything else requires Android API 21+.
      androidSignature(rootProject.libs.signature.android.apilevel21) { artifact { type = "signature" } }
    }

    // OkHttp requires Java 8+.
    jvmSignature(rootProject.libs.codehaus.signature.java18) { artifact { type = "signature" } }
  }

def _get_signature(call: Callable[..., Any]) -> inspect.Signature:
    if sys.version_info >= (3, 10):
        try:
            signature = inspect.signature(call, eval_str=True)
        except NameError:
            # Handle type annotations with if TYPE_CHECKING, not used by FastAPI
            # e.g. dependency return types
            signature = inspect.signature(call)
    else:
        signature = inspect.signature(call)
    return signature

If you want to play with JWT tokens and see how they work, check <a href="https://jwt.io/" class="external-link" target="_blank">https://jwt.io</a>.

## Install `PyJWT` { #install-pyjwt }

dependencies {
  // Everything else requires Android API 21+.
  androidSignature(rootProject.libs.signature.android.apilevel21) { artifact { type = "signature" } }

  // OkHttp requires Java 8+.
  jvmSignature(rootProject.libs.codehaus.signature.java18) { artifact { type = "signature" } }

  checkstyleConfig(rootProject.libs.checkStyle) {
    isTransitive = false
  }
}

            </annotations>
            <checkTestClasses>true</checkTestClasses>
            <signature>
              <groupId>org.codehaus.mojo.signature</groupId>
              <artifactId>java18</artifactId>
              <version>${java18-signature.version}</version>
            </signature>
          </configuration>
          <executions>
            <execution>

robolectric-android = "org.robolectric:android-all:16-robolectric-13921718"
robolectric = "org.robolectric:robolectric:4.16"
#noinspection UnusedVersionCatalogEntry
signature-android-apilevel21 = "net.sf.androidscents.signature:android-api-level-21:5.0.1_r2"
#noinspection UnusedVersionCatalogEntry
signature-android-apilevel24 = "net.sf.androidscents.signature:android-api-level-24:7.0_r2"

import okio.BufferedSource

/**
 * Returns true if the body in question probably contains human-readable text. Uses a small
 * sample of code points to detect Unicode control characters commonly used in binary file
 * signatures.
 *
 * @param codePointLimit the number of code points to read in order to make a decision.
 */
internal fun BufferedSource.isProbablyUtf8(codePointLimit: Long = Long.MAX_VALUE): Boolean {
  try {
    val peek = peek()

  override fun buildTrustRootIndex(trustManager: X509TrustManager): TrustRootIndex =
    try {
      StrictMode.noteSlowCall("buildTrustRootIndex")

      // From org.conscrypt.TrustManagerImpl, we want the method with this signature:
      // private TrustAnchor findTrustAnchorByIssuerAndSignature(X509Certificate lastCert);
      val method =
        trustManager.javaClass.getDeclaredMethod(
          "findTrustAnchorByIssuerAndSignature",