public Builder setValueBytes(com.google.protobuf.ByteString value) {
        if (value == null) {
          throw new NullPointerException();
        }
        checkByteStringIsUtf8(value);
        value_ = value;
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
The class item's value.
</pre>

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

@param value The bytes for value to set.
@return This builder for chaining.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/CustomClass.java