public Builder clearMachineType() {
      machineType_ = getDefaultInstance().getMachineType();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Immutable. The type of the machine.

See the [list of machine types supported for
prediction](https://cloud.google.com/vertex-ai/docs/predictions/configure-compute#machine-types)

See the [list of machine types supported for custom
training](https://cloud.google.com/vertex-ai/docs/training/configure-compute#machine-types).

For [DeployedModel][google.cloud.aiplatform.v1.DeployedModel] this field is
optional, and the default value is `n1-standard-2`. For
[BatchPredictionJob][google.cloud.aiplatform.v1.BatchPredictionJob] or as
part of [WorkerPoolSpec][google.cloud.aiplatform.v1.WorkerPoolSpec] this
field is required.
</pre>

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

@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/MachineSpec.java