class ActiveRecord::Associations::Builder::HasMany

def self.macro
  :has_many
end

def self.valid_dependent_options
  [:destroy, :delete_all, :nullify, :restrict_with_error, :restrict_with_exception, :destroy_async]
end

def self.valid_options(options)
  valid = super + [:counter_cache, :join_table, :index_errors, :as, :through]
  valid += [:foreign_type] if options[:as]
  valid += [:source, :source_type, :disable_joins] if options[:through]
  valid += [:ensuring_owner_was] if options[:dependent] == :destroy_async
  valid
end