code: function init() {
      var debugFile = path.join(__dirname, 'debug.js');
  
      if (debug) {
          if (fs.existsSync(debugFile)) { fs.unlinkSync(debugFile); }
          debugFD = fs.openSync(debugFile, 'a');
      }
  
      getFileList(modelsPath).forEach(defineModel);
      processAllRelations(defineRelation);
  
      if (debug) {
          fs.closeSync(debugFD);
      }
  }
docs: Initializes models.
  @private