public String getChecksum() {
        return this.checksum;
    }
<p>
Identifies a specific revision of the <code>$LATEST</code> version of the bot. If you specify a checksum and the
<code>$LATEST</code> version of the bot has a different checksum, a <code>PreconditionFailedException</code>
exception is returned and Amazon Lex doesn't publish a new version. If you don't specify a checksum, Amazon Lex
publishes the <code>$LATEST</code> version.
</p>

@return Identifies a specific revision of the <code>$LATEST</code> version of the bot. If you specify a checksum
        and the <code>$LATEST</code> version of the bot has a different checksum, a
        <code>PreconditionFailedException</code> exception is returned and Amazon Lex doesn't publish a new
        version. If you don't specify a checksum, Amazon Lex publishes the <code>$LATEST</code> version.
aws-java-sdk-lexmodelbuilding/src/main/java/com/amazonaws/services/lexmodelbuilding/model/CreateBotVersionRequest.java