public Builder clearMachineSpec() {
      bitField0_ = (bitField0_ & ~0x00000001);
      machineSpec_ = null;
      if (machineSpecBuilder_ != null) {
        machineSpecBuilder_.dispose();
        machineSpecBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. Immutable. The specification of a single machine used by the
prediction.
</pre>

<code>
.google.cloud.visionai.v1.MachineSpec machine_spec = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/DedicatedResources.java