public Builder setFallbackStartingOffset(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      fallbackStartingOffset_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<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>

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