public Builder setAws(com.google.cloud.vmmigration.v1.AwsSourceDetails value) {
      if (awsBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        sourceDetails_ = value;
        onChanged();
      } else {
        awsBuilder_.setMessage(value);
      }
      sourceDetailsCase_ = 12;
      return this;
    }
<pre>
AWS type source details.
</pre>

<code>.google.cloud.vmmigration.v1.AwsSourceDetails aws = 12;</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/Source.java