Documenting def_delegators with Yardoc

I have a class that uses the def_delegators method from the Forwardable module. I haven't found a way to get Yardoc to output documentation for it. I've tried using a macro but it won't output anything for these particular methods (everything else in the file is fine, and there are no errors), and I've several def_delegators of differing lengths.

e.g.

class A
  extend Forwardable
  # other code…

  # @!macro
  #   @see Array#$1
  #   @see Array#$2
  #   @see Array#$3
  def_delegators :@xs, :size, :<<, :blah # …

Is there a gem, or a way to do this that means I can avoid trying to write a Yard extension?

After more experimentation I found that this worked quite well:

  # @!method size
  #   @see Array#size
  # @!method <<
  #   @see Array#<<
  # @!method blah
  #   @see Array#blah
  def_delegators :@xs, :size, :<<, :blah # …

There is quite possibly a way to do this in one or two lines, but compared to the work writing an extension I find this very acceptable.

Update:

I've just found this will link to the delegated methods' documentation better:

  # @!method size
  #   @return (see Array#size)

This would take the already documented return value from the Array#size method. I expect the other tags will do this too. It's still quite verbose, but acceptable.