private void ensureBucketsIsMutable() {
      if (!((bitField0_ & 0x00000004) != 0)) {
        buckets_ = new java.util.ArrayList<com.google.cloud.visionai.v1.FacetBucket>(buckets_);
        bitField0_ |= 0x00000004;
      }
    }
<pre>
Display name of the facet. To be used by UI for facet rendering.
</pre>

<code>string display_name = 2;</code>

@param value The bytes for displayName to set.
@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/FacetGroup.java