code: @Override
      protected void populateStatusString2FaxStatusMappings()
      {
          //populate map
          FaxJobStatus[] faxJobStatuses=new FaxJobStatus[]{FaxJobStatus.PENDING,FaxJobStatus.IN_PROGRESS,FaxJobStatus.ERROR};
          Enum<?>[] configurationKeys=new Enum<?>[]{JSONHTTPResponseHandlerConfigurationConstants.PENDING_STATUS_MAPPING_PROPERTY_KEY,
                                       JSONHTTPResponseHandlerConfigurationConstants.IN_PROGRESS_STATUS_MAPPING_PROPERTY_KEY,
                                       JSONHTTPResponseHandlerConfigurationConstants.ERROR_STATUS_MAPPING_PROPERTY_KEY};
          this.populateStatusString2FaxStatusMappings(faxJobStatuses,configurationKeys);
      }
docs: This function populates the status strings to fax status enum values
  based on the configuration of the handler.