public com.google.protobuf.ByteString getNodeTypeIdBytes() {
        java.lang.Object ref = nodeTypeId_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          nodeTypeId_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
Required. The canonical identifier of the node type to add or remove.
Corresponds to the `NodeType`.
</pre>

<code>string node_type_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for nodeTypeId.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/AutoscalingSettings.java