public void setModifiedAt(java.util.Date modifiedAt) {
        this.modifiedAt = modifiedAt;
    }
<p>
The date and time that the alert manager definition was most recently changed.
</p>

@param modifiedAt
       The date and time that the alert manager definition was most recently changed.
aws-java-sdk-prometheus/src/main/java/com/amazonaws/services/prometheus/model/AlertManagerDefinitionDescription.java