code: public void addAddVersion(String source, String name, String value, Confidence confidence) {
          addVersion.add(new Evidence(source, name, value, confidence));
      }
docs: Adds a given version to the list of evidence to add when matched.
  
  @param source the source of the evidence
  @param name the name of the evidence
  @param value the value of the evidence
  @param confidence the confidence of the evidence