code: public static Class<? extends CobolContext> getInputKeyCobolContext(Configuration conf) {
        return conf.getClass(CONF_INPUT_KEY_COBOL_CONTEXT, null, CobolContext.class);
      }
docs: Gets the job input key mainframe COBOL parameters.
  
  @param conf The job configuration.
  @return The job input key mainframe COBOL parameters, or null if not set.