code: function(moduleName) {
  		var fs = require("fs");
  		var ret = false;
      	var dirSeparator = require("path").sep
      	module.paths.forEach(function(nodeModulesPath) {
          	if(fs.existsSync(nodeModulesPath + dirSeparator + moduleName) === true) {
              	ret = true;
              	return false;
          	}
      	});
      	return ret;
  	}
docs: (Internal) Checks if module is available in filesystem
  @param {string} moduleName - Name of the module to check