code: public static Class<? extends CobolComplexType> getInputKeyRecordType(Configuration conf) {
        return conf.getClass(CONF_INPUT_KEY_RECORD_TYPE, null, CobolComplexType.class);
      }
docs: Gets the job input key mainframe record type.
  
  @param conf The job configuration.
  @return The job input key mainframe record type, or null if not set.