@Override
    public AndCondition and(Condition that) {
        return new AndCondition(_(this), that.atomic() ? that : _(that));
    }
Represents an <a href=
"http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html#ConditionExpressionReference"
>OR</a> condition in building condition expressions.
<p>
This object is as immutable (or unmodifiable) as the underlying conditions.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/xspec/OrCondition.java