static final void validateEcdsaAlgorithm(JwtEcdsaAlgorithm algorithm)
      throws GeneralSecurityException {
    // Purposely ignore the result. This function will throw if the algorithm is invalid.
    Object unused = hashForEcdsaAlgorithm(algorithm);
  }
This key manager produces new instances of {@code JwtEcdsaVerify}. It doesn't support key
generation.
java_src/src/main/java/com/google/crypto/tink/jwt/JwtEcdsaVerifyKeyManager.java