public com.google.cloud.visionai.v1.PacketType.Builder getTypeBuilder() {
      bitField0_ |= 0x00000002;
      onChanged();
      return getTypeFieldBuilder().getBuilder();
    }
<pre>
Input only. Immutable. The type of the payload.
</pre>

<code>
.google.cloud.visionai.v1.PacketType type = 2 [(.google.api.field_behavior) = INPUT_ONLY, (.google.api.field_behavior) = IMMUTABLE];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/PacketHeader.java