code: function(loader, packageJSON, isRoot){
  		var config = utils.pkg.config(packageJSON);
  		var hasConfig = !!config;
  
  		// convert npmIgnore
  		var npmIgnore = hasConfig && config.npmIgnore;
  		function convertToMap(arr) {
  			var npmMap = {};
  			for(var i = 0; i < arr.length; i++) {
  				npmMap[arr[i]] = true;
  			}
  			return npmMap;
  		}
  		if(npmIgnore && typeof npmIgnore.length === 'number') {
  			npmIgnore = config.npmIgnore = convertToMap(npmIgnore);
  		}
  		// convert npmDependencies
  		var npmDependencies = hasConfig && config.npmDependencies;
  		if(npmDependencies && typeof npmDependencies.length === "number") {
  			config.npmDependencies = convertToMap(npmDependencies);
  		}
  		npmIgnore = npmIgnore || {};
  
  		var deps = {};
  
  		addDeps(packageJSON, packageJSON.peerDependencies || {}, deps,
  				"peerDependencies", {_isPeerDependency: true});
  
  		addDeps(packageJSON, packageJSON.dependencies || {}, deps, "dependencies");
  
  		if(isRoot) {
  			addDeps(packageJSON, packageJSON.devDependencies || {}, deps,
  				   "devDependencies");
  		}
  
  		return deps;
  	}
docs: Returns a map of the dependencies and their ranges.
  @param {Object} loader
  @param {Object} packageJSON
  @param {Boolean} isRoot
  @return {Object<String,Range>} A map of dependency names and requested version ranges.