public void setReasons(java.util.Collection<String> reasons) {
        if (reasons == null) {
            this.reasons = null;
            return;
        }

        this.reasons = new java.util.ArrayList<String>(reasons);
    }
<p>
The reason why the deletion was unsuccessful.
</p>

@param reasons
       The reason why the deletion was unsuccessful.
@see UnsuccessfulFaceDisassociationReason
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/UnsuccessfulFaceDisassociation.java