code: private int stage5Parameter(final ProtoNetwork network,
              Set<EquivalenceDataIndex> equivalences, final StringBuilder bldr) {
          bldr.append("Equivalencing parameters");
          stageOutput(bldr.toString());
          ProtoNetwork ret = network;
          int ct = 0;
          try {
              ct = p2.stage3EquivalenceParameters(ret, equivalences);
              stageOutput("(" + ct + " equivalences)");
          } catch (IOException ioex) {
              final String err = ioex.getMessage();
              fatal(err);
          }
  
          return ct;
      }
docs: Stage five parameter equivalencing.
  
  @param network the {@link ProtoNetwork network} to equivalence
  @param equivalences the {@link Set set} of {@link EquivalenceDataIndex}
  @param bldr the {@link StringBuilder}
  @return the {@code int} count of parameter equivalences