public Builder mergeManagedServerCa(
        com.google.cloud.memorystore.v1.CertificateAuthority.ManagedCertificateAuthority value) {
      if (managedServerCaBuilder_ == null) {
        if (serverCaCase_ == 2
            && serverCa_
                != com.google.cloud.memorystore.v1.CertificateAuthority.ManagedCertificateAuthority
                    .getDefaultInstance()) {
          serverCa_ =
              com.google.cloud.memorystore.v1.CertificateAuthority.ManagedCertificateAuthority
                  .newBuilder(
                      (com.google.cloud.memorystore.v1.CertificateAuthority
                              .ManagedCertificateAuthority)
                          serverCa_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          serverCa_ = value;
        }
        onChanged();
      } else {
        if (serverCaCase_ == 2) {
          managedServerCaBuilder_.mergeFrom(value);
        } else {
          managedServerCaBuilder_.setMessage(value);
        }
      }
      serverCaCase_ = 2;
      return this;
    }
<pre>
A managed server certificate authority.
</pre>

<code>
.google.cloud.memorystore.v1.CertificateAuthority.ManagedCertificateAuthority managed_server_ca = 2;
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/CertificateAuthority.java