public List<String> getMatchingETagConstraints() {
        return matchingETagConstraints;
    }
Gets the optional list of ETag constraints that, when present, <b>must</b>
include a match for the object's current ETag in order for this
request to be executed. Only one ETag in the list needs to match for this
request to be executed by Amazon S3.

@return The optional list of ETag constraints that when present <b>must</b>
        include a match for the object's current ETag in order for this
        request to be executed.

@see GetObjectRequest#setMatchingETagConstraints(List)
@see GetObjectRequest#withMatchingETagConstraint(String)
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/GetObjectRequest.java