docs: public static Object readJsonInput( File file, boolean suppressOutput ) {
          Object jsonObject;
          if ( file == null ) {
              try {
                  jsonObject = JsonUtils.jsonToMap( System.in );
              } catch ( Exception e ) {
                  printToStandardOut( "Failed to process standard input.", suppressOutput );
                  return null;
              }
          } else {
              jsonObject = createJsonObjectFromFile( file, suppressOutput );
          }
          return jsonObject;
      }