@RestrictedApi(
      explanation = "Accessing parts of keys can produce unexpected incompatibilities, annotate the function with @AccessesPartialKey",
      link = "https://developers.google.com/tink/design/access_control#accessing_partial_keys",
      allowedOnPath = ".*Test\\.java",
      allowlistAnnotations = {AccessesPartialKey.class})
  public static Builder builder() {
    return new Builder();
  }
Sets the CRT coefficient qInv.

<p>See https://datatracker.ietf.org/doc/html/rfc7518#section-6.3.2.6.

<p>This is required.
java_src/src/main/java/com/google/crypto/tink/jwt/JwtRsaSsaPssPrivateKey.java