class RuboCop::AST::NodePattern::Node::AnyOrder

def arity
  return children.size unless ends_with_rest?
  ARITIES[children.size]
end

def ends_with_rest?
  children.last.rest?
end

def rest_node
  children.last if ends_with_rest?
end

def term_nodes
  ends_with_rest? ? children[0...-1] : children
end