public Builder setSourceBytes(com.google.protobuf.ByteString value) {
        if (value == null) {
          throw new NullPointerException();
        }
        checkByteStringIsUtf8(value);
        source_ = value;
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
Full name of the resource to transfer as specified in the request.
</pre>

<code>string source = 1;</code>

@param value The bytes for source to set.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/BatchTransferResourcesResponse.java