private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.vmmigration.v1.Source,
            com.google.cloud.vmmigration.v1.Source.Builder,
            com.google.cloud.vmmigration.v1.SourceOrBuilder>
        getSourcesFieldBuilder() {
      if (sourcesBuilder_ == null) {
        sourcesBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.vmmigration.v1.Source,
                com.google.cloud.vmmigration.v1.Source.Builder,
                com.google.cloud.vmmigration.v1.SourceOrBuilder>(
                sources_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
        sources_ = null;
      }
      return sourcesBuilder_;
    }
<pre>
Output only. The list of sources response.
</pre>

<code>
repeated .google.cloud.vmmigration.v1.Source sources = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/ListSourcesResponse.java