public Problem code(String code) {
    
    this.code = code;
    return this;
  }
A URI reference that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced. 
@return instance
plc4j/drivers/ctrlx/src/main/java/org/apache/plc4x/java/ctrlx/readwrite/rest/datalayer/model/Problem.java