public Builder dualStack(Boolean dualStack) {
            this.dualStack = dualStack;
            return this;
        }
Sets the dualstack.

@param dualStack dualstack to set.
@return Returns the builder.
smithy-aws-endpoints/src/main/java/software/amazon/smithy/rulesengine/aws/traits/PartitionEndpointSpecialCase.java