shim/node/engine.js
function registerHelpers(helpers) {
    var s = this;
    var names = Object.keys(helpers || {});

    for (var i = 0, len = names.length; i < len; i++) {
      var name = names[i];
      s.registerHelper(name, helpers[name]);
    }

    return s;
  }
function registerHelpers(helpers) {
    var s = this;
    var names = Object.keys(helpers || {});

    for (var i = 0, len = names.length; i < len; i++) {
      var name = names[i];
      s.registerHelper(name, helpers[name]);
    }

    return s;
  }
function registerHelpers ( helpers ) { var s = this ; var names = Object . keys ( helpers || { } ) ; for ( var i = 0 , len = names . length ; i < len ; i ++ ) { var name = names [ i ] ; s . registerHelper ( name , helpers [ name ] ) ; } return s ; }
Register multiple helpers.
@param {object} helpers - Helpers to register.
@returns {HandlebarsEngine} - Returns self.
Register multiple helpers .