define(['jquery', 'select2/core'] , function ($, Select2){ 
if ($.fn.select2 == null ) { 
$.fn.select2 = function (options){ 
options = options || { 
}
; 
if (typeof options === 'object') { 
this.each(function (){ 
var instance = new Select2($(this), options); 
} 
); 
} 
 else if (typeof options === 'string') { 
var instance = this.data('select2'); 
var args = Array.prototype.slice.call(arguments, 1); 
instance[options](args); 
} 
 else { 
throw new Error('Invalid arguments for Select2: ' + options)
} 
} 
; 
} 
return Select2; 
} 
);