class Unparser::AST::Enumerator

def self.set(enumerable)
  enumerable.to_set.freeze
end

def self.type(node, type)
  new(node).type(type)
end

def each(&)
  Walker.call(node, controller, &)
end

def type(type)
  select { |node| node.type.equal?(type) }
end

def types(types)
  select { |node| types.include?(node.type) }
end