private com.google.protobuf.MapField<java.lang.String, java.lang.String>
        internalGetMutableLabels() {
      if (labels_ == null) {
        labels_ = com.google.protobuf.MapField.newMapField(LabelsDefaultEntryHolder.defaultEntry);
      }
      if (!labels_.isMutable()) {
        labels_ = labels_.copy();
      }
      bitField0_ |= 0x00000100;
      onChanged();
      return labels_;
    }
<pre>
Optional. Files present in a blueprint.
When invoking UpdateBlueprint API, only the modified files should be
included in this. Files that are not included in the update of a blueprint
will not be changed.
</pre>

<code>
repeated .google.cloud.telcoautomation.v1.File files = 9 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-telcoautomation/proto-google-cloud-telcoautomation-v1/src/main/java/com/google/cloud/telcoautomation/v1/Blueprint.java