@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(endpoint_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, endpoint_);
    }
    for (int i = 0; i < instances_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, instances_.get(i));
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getParameters());
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
The parameters that govern the prediction. The schema of the parameters may
be specified via Endpoint's DeployedModels' [Model's
][google.cloud.aiplatform.v1.DeployedModel.model]
[PredictSchemata's][google.cloud.aiplatform.v1.Model.predict_schemata]
[parameters_schema_uri][google.cloud.aiplatform.v1.PredictSchemata.parameters_schema_uri].
</pre>

<code>.google.protobuf.Value parameters = 3;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/PredictRequest.java