Set::SubclassCompatible#intersect?

# File tmp/rubies/ruby-4.0.0/lib/set/subclass_compatible.rb, line 171
def intersect?(set)
  case set
  when Set
    if size < set.size
      any?(set)
    else
      set.any?(self)
    end
  when Enumerable
    set.any?(self)
  else
    raise ArgumentError, "value must be enumerable"
  end
end