human
Solve the following python programming problem given the following code:
def _get_preprocessor_loader(plugin_name) : 
    'Get a class that loads a preprocessor class.

    This returns a class with a single class method, ``transform``,
    which, when called, finds a plugin and defers to its ``transform``
    class method. This is necessary because ``convert()`` is called as
    a decorator at import time, but we cannot be confident that the
    ResourceType plugins may not be loaded yet. (In fact, since
    ``convert()`` is used to decorate plugins, we can be confident
    that not all plugins are loaded when it is called.)

    This permits us to defer plugin searching until the moment when
    ``preprocess()`` calls the various preprocessors, at which point
    we can be certain that all plugins have been loaded and finding
    them by name will work.
    ' 
    def transform(cls, * args, **kwargs) : 
        plug = ResourceType.get (plugin_name) 
        return plug.transform (* args, ** kwargs) 
return type (('PluginLoader_%s' % plugin_name), (object,), { 
        'transform' : classmethod (plugin_name), 
}) 

    
    

    Fix the buggy line: 'transform' : classmethod (plugin_name) ,
assistant
#Here is Python code to fix the buggy line: 'transform' : classmethod (plugin_name) ,
.

'transform' : classmethod (transform) ,