def is_default_argument(node: astroid.node_classes.NodeNG) -> bool:
parent = node.scope()<EOL>if isinstance(parent, (astroid.FunctionDef, astroid.Lambda)):<EOL><INDENT>for default_node in parent.args.defaults:<EOL><INDENT>for default_name_node in default_node.nodes_of_class(astroid.Name):<EOL><INDENT>if default_name_node is node:<EOL><INDENT>return True<EOL><DEDENT><DEDENT><DEDENT><DEDENT>return False<EOL>
return true if the given Name node is used in function or lambda
    default argument's value