public com.google.cloud.memorystore.v1beta.CertificateAuthority.ManagedCertificateAuthority
              .CertChain.Builder
          addCaCertsBuilder(int index) {
        return getCaCertsFieldBuilder()
            .addBuilder(
                index,
                com.google.cloud.memorystore.v1beta.CertificateAuthority.ManagedCertificateAuthority
                    .CertChain.getDefaultInstance());
      }
<pre>
PEM encoded CA certificate chains for managed server authentication.
</pre>

<code>
repeated .google.cloud.memorystore.v1beta.CertificateAuthority.ManagedCertificateAuthority.CertChain ca_certs = 1;
</code>
java-valkey/proto-google-cloud-valkey-v1beta/src/main/java/com/google/cloud/memorystore/v1beta/CertificateAuthority.java