docs: @Deprecated
      @SuppressFBWarnings("ES_COMPARING_STRINGS_WITH_EQ")
      public String getRefConstantOperand() {
          if (refConstantOperand == NOT_AVAILABLE) {
              throw new IllegalStateException("getRefConstantOperand called but value not available");
          }
          if (refConstantOperand == null) {
              String dottedClassConstantOperand = getDottedClassConstantOperand();
              StringBuilder ref = new StringBuilder(dottedClassConstantOperand.length() + nameConstantOperand.length()
                      + sigConstantOperand.length() + 5);
              ref.append(dottedClassConstantOperand).append(".").append(nameConstantOperand).append(" : ")
              .append(replaceSlashesWithDots(sigConstantOperand));
              refConstantOperand = ref.toString();
          }
          return refConstantOperand;
      }