human
Solve the following python programming problem given the following code:
def execfile_extractor(node) : 
    @ calledWithBuiltinArgumentNamesDecorator 
    def wrapExpressionBuiltinExecfileCreation(filename, globals_arg, locals_arg, source_ref) : 
        outline_body = ExpressionOutlineBody (provider = node.getParentVariableProvider (), name = 'execfile_call', source_ref = source_ref) 
        (globals_ref, locals_ref, tried, final) = wrapEvalGlobalsAndLocals (provider = node.getParentVariableProvider (), globals_node = globals_arg, locals_node = locals_arg, temp_scope = outline_body.getOutlineTempScope (), source_ref = source_ref) 
        tried = makeStatementsSequence (statements = (tried, StatementReturn (expression = ExpressionBuiltinExecfile (source_code = ExpressionCallEmpty (called = ExpressionAttributeLookup (source = ExpressionBuiltinOpen (filename = filename, mode = ExpressionConstantRef (constant = 'rU', source_ref = source_ref), buffering = None, source_ref = source_ref), attribute_name = 'read', source_ref = source_ref), source_ref = source_ref), globals_arg = globals_ref, locals_arg = locals_ref, source_ref = source_ref), source_ref = source_ref)), allow_none = False, source_ref = source_ref) 
        outline_body.setBody (makeStatementsSequenceFromStatement (statement = makeTryFinallyStatement (provider = outline_body, tried = tried, final = final, source_ref = source_ref))) 
        return outline_body 
return BuiltinOptimization.extractBuiltinArgs (node = node, builtin_class = <MASK>, builtin_spec = BuiltinOptimization.builtin_execfile_spec) 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: node
assistant
#Here is a proper replacement for <MASK>.
def wrapExpressionBuiltinExecfileCreation(