private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.EncryptionSpec,
            com.google.cloud.vertexai.api.EncryptionSpec.Builder,
            com.google.cloud.vertexai.api.EncryptionSpecOrBuilder>
        getEncryptionSpecFieldBuilder() {
      if (encryptionSpecBuilder_ == null) {
        encryptionSpecBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.EncryptionSpec,
                com.google.cloud.vertexai.api.EncryptionSpec.Builder,
                com.google.cloud.vertexai.api.EncryptionSpecOrBuilder>(
                getEncryptionSpec(), getParentForChildren(), isClean());
        encryptionSpec_ = null;
      }
      return encryptionSpecBuilder_;
    }
<pre>
Customer-managed encryption key spec for an Endpoint. If set, this
Endpoint and all sub-resources of this Endpoint will be secured by
this key.
</pre>

<code>.google.cloud.vertexai.v1.EncryptionSpec encryption_spec = 10;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Endpoint.java