public Builder setContentEncoding(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      contentEncoding_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
Optional. Updates objects Content-Encoding fixed metadata. Unset values
will be ignored. Set empty values to clear the metadata. Refer to
documentation in
https://cloud.google.com/storage/docs/metadata#content-encoding.
</pre>

<code>optional string content_encoding = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The contentEncoding to set.
@return This builder for chaining.
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/PutMetadata.java