public Builder setHash(com.google.protobuf.ByteString value) {
        if (value == null) {
          throw new NullPointerException();
        }
        hash_ = value;
        bitField0_ |= 0x00000002;
        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>

@param value The hash to set.
@return This builder for chaining.
java-webrisk/proto-google-cloud-webrisk-v1beta1/src/main/java/com/google/webrisk/v1beta1/SearchHashesResponse.java