@java.lang.Override
  public com.google.protobuf.ByteString getFallbackStartingOffsetBytes() {
    java.lang.Object ref = fallbackStartingOffset_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      fallbackStartingOffset_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
This is the logical starting point to fallback upon should the
specified starting offset be unavailable.

This can be one of the following values:

"begin": This will read from the earliest available message.

"end": This will read only future messages.
</pre>

<code>string fallback_starting_offset = 2;</code>

@return The bytes for fallbackStartingOffset.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ControlledMode.java