def METHOD_NAME(self, node):
    """
    Turn global variable used not shadows to function call.
    We check it is a name from an assignment as import or functions use
    should not be turn into call.
    """
    if (isinstance(node.ctx, ast.Load) and
            node.id not in self.local_decl and
            node.id in self.to_expand):
        self.update = True
        return ast.Call(func=node,
                        args=[], keywords=[])
    return node