public Builder clearHash() {
        bitField0_ = (bitField0_ & ~0x00000002);
        hash_ = getDefaultInstance().getHash();
        onChanged();
        return this;
      }
<pre>
A 32 byte SHA256 hash. This field is in binary format. For JSON
requests, hashes are base64-encoded.
</pre>

<code>bytes hash = 2;</code>

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