public Builder setVertexModel(java.lang.String value) {
        if (value == null) {
          throw new NullPointerException();
        }
        vertexModel_ = value;
        bitField0_ |= 0x00000002;
        onChanged();
        return this;
      }
<pre>
Optional. The resource name of embedding model hosted in Vertex AI
Platform.
</pre>

<code>string vertex_model = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The vertexModel to set.
@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/CustomProcessorSourceInfo.java