docs: private <T> void visitFractions(Container container, T context, FractionProcessor<T> fn) {
          OUTER:
          for (ServerConfiguration eachConfig : this.configList) {
              boolean found = false;
              INNER:
              for (Fraction eachFraction : container.fractions()) {
                  if (eachConfig.getType().isAssignableFrom(eachFraction.getClass())) {
                      found = true;
                      fn.accept(context, eachConfig, eachFraction);
                      break INNER;
                  }
              }
              if (!found && !eachConfig.isIgnorable()) {
                  System.err.println("*** unable to find fraction for: " + eachConfig.getType());
              }
  
          }
      }