public Builder clearBucket() {
        bucket_ = getDefaultInstance().getBucket();
        bitField0_ = (bitField0_ & ~0x00000001);
        onChanged();
        return this;
      }
<pre>
Required. Bucket name for the objects to be transformed.
</pre>

<code>string bucket = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return This builder for chaining.
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/BucketList.java