code: function initBLModel(soajs, cb) {
      let modelName = driverConfig.model;
      if (soajs.servicesConfig && soajs.servicesConfig.model) {
          modelName = soajs.servicesConfig.model;
      }
      if (process.env.SOAJS_TEST && soajs.inputmaskData && soajs.inputmaskData.model) {
          modelName = soajs.inputmaskData.model;
      }
  
      let modelPath = __dirname + "/model/" + modelName + ".js";
      return requireModel(modelPath, cb);
  
      /**
       * checks if model file exists, requires it and returns it.
       * @param filePath
       * @param cb
       */
      function requireModel(filePath, cb) {
          //check if file exist. if not return error
          fs.exists(filePath, function (exists) {
              if (!exists) {
                  soajs.log.error('Requested Model Not Found!');
                  return cb(601);
              }
  
              driver.model = require(filePath);
              return cb();
          });
      }
  
  }
docs: Initialize the Business Logic model and set it on driver