human
Solve the following python programming problem given the following code:
def build_swagger_20_swagger_schema_views(config) : 
    def view_for_swagger_schema(request) : 
        settings = config.registry.settings 
        resolved_dict = settings.get ('pyramid_swagger.schema20_resolved') 
        if (not resolved_dict) : 
            spec = settings ['pyramid_swagger.schema20'] 
            spec_copy = copy.deepcopy (spec.client_spec_dict) 
            resolved_dict = resolve_refs (spec, spec_copy) 
            settings ['pyramid_swagger.schema20_resolved'] = resolved_dict 
return resolved_dict 
(yield PyramidEndpoint (path = '/swagger.json', route_name = 'pyramid_swagger.swagger20.api_docs.json', view = view_for_swagger_schema, renderer = 'json')) 
    (yield PyramidEndpoint (path = '/swagger.yaml', route_name = 'pyramid_swagger.swagger20.api_docs.yaml', view = <MASK>, renderer = 'yaml')) 
    
    Given the code above, what is a proper replacement for <MASK>?
assistant
#Here is a proper replacement for <MASK>.
view_for_swagger_schema