public Builder clearVmId() {
      vmId_ = getDefaultInstance().getVmId();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
The VM's ID in the source.
</pre>

<code>string vm_id = 3;</code>

@return This builder for chaining.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/VmUtilizationInfo.java