code: public CreateIssueParams estimatedHours(BigDecimal estimatedHours) {
          if (estimatedHours == null) {
              parameters.add(new NameValuePair("estimatedHours", ""));
          } else {
              parameters.add(new NameValuePair("estimatedHours", estimatedHours.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()));
          }
          return this;
      }
docs: Sets the issue estimate hours.
  
  @param estimatedHours the issue estimate hours
  @return CreateIssueParams instance