public Optional<String> getRequestValidationModeMember() {
        return Optional.ofNullable(requestValidationModeMember);
    }
Optionally gets name of the input member used to specify opt-in behavior
for response checksum validation.

@return Returns optional input member name.
smithy-aws-traits/src/main/java/software/amazon/smithy/aws/traits/HttpChecksumTrait.java