public void setNextToken(String nextToken) {
        this.nextToken = nextToken;
    }
The token for the next set of results, or ''null'' if there are no additional results.

@param nextToken
       The token for the next set of results, or ''null'' if there are no additional results.
aws-java-sdk-greengrass/src/main/java/com/amazonaws/services/greengrass/model/GetCoreDefinitionVersionResult.java