Resolves https://github.com/spring-projects/spring-integration/issues/2818 * Rework to improve fluency * reduce the number of factory methods and use a different spec when an external WST is provided. * Docs and address comments
Resolves https://github.com/spring-projects/spring-integration/issues/2818 * Rework to improve fluency * reduce the number of factory methods and use a different spec when an external WST is provided. * Docs and address comments