human
Solve the following python programming problem given the following code:
@ property 
def case_json(self) : 
    json = self.couch_doc.to_api_json (lite = _sanitize.lite) 
    if self.sanitize : 
        def _sanitize(props) : 
            for (key, val) in props.items () : 
                if (val is None) : 
                    props [key] = '' 
else : 
                    if isinstance (val, dict) : 
                        props [key] = _sanitize (val) 
return props 
json = _sanitize (dict (json)) 
return json 

    
    

    Fix the buggy line: json = self.couch_doc.to_api_json (lite = _sanitize.lite)
assistant
#Here is Python code to fix the buggy line: json = self.

json = self.couch_doc.to_api_json (lite = self.lite)