class YARD::Handlers::Ruby::Legacy::MixinHandler

def process_mixin(mixin)
  mixmatch = mixin[/\A(#{NAMESPACEMATCH})/, 1]
  raise YARD::Parser::UndocumentableError unless mixmatch
  case obj = Proxy.new(namespace, mixmatch)
  when ConstantObject # If a constant is included, use its value as the real object
    obj = Proxy.new(namespace, obj.value, :module)
  else
    obj = Proxy.new(namespace, mixmatch, :module)
  end
  namespace.mixins(scope).unshift(obj) unless namespace.mixins(scope).include?(obj)
end