public Builder setTypeClassBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      typeClass_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<pre>
The type class of the packet. Its possible values are:
"gst", "protobuf", and "string".
</pre>

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

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