public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
<pre>
Model schema files which specifies the signature of the model.
For VERTEX_CUSTOM models, instances schema is required.
If instances schema is not specified during the processor creation,
VisionAI Platform will try to get it from Vertex, if it doesn't exist, the
creation will fail.
</pre>

<code>.google.cloud.visionai.v1.CustomProcessorSourceInfo.ModelSchema model_schema = 5;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/CustomProcessorSourceInfo.java