public void setPreparedAt(java.util.Date preparedAt) {
        this.preparedAt = preparedAt;
    }
<p>
The time at which the <code>DRAFT</code> version of the agent was last prepared.
</p>

@param preparedAt
       The time at which the <code>DRAFT</code> version of the agent was last prepared.
aws-java-sdk-bedrockagent/src/main/java/com/amazonaws/services/bedrockagent/model/PrepareAgentResult.java