human
Solve the following python programming problem given the following code:
def _create_plugin(self, option_classes) : 
    def merge_class(plugin_class) : 
        if option_classes : 
            attrs = { 
                
} 
            bases = [plugin_class] 
            for oc in option_classes : 
                attrs.update (self._get_merge_attrs (oc, plugin_class)) 
                meta_class = getattr (oc, plugin_class.__name__, getattr (oc, plugin_class.__name__.replace ('Plugin', ''), None)) 
                if meta_class : 
                    bases.insert (0, meta_class) 
if attrs : 
                plugin_class = MergeAdminMetaclass (('%s%s' % (''.join ([oc.__name__ for oc in option_classes]), plugin_class.__name__)), tuple (bases), attrs) 
return plugin_class 
return option_classes 

    
    

    Fix the buggy line: return option_classes
assistant
#Here is Python code to fix the buggy line: return option_classes
.

return def merge_class(