# File lib/soap/element.rb, line 211
  def add(name, value)
    actor = value.extraattr[AttrActorName]
    mu = value.extraattr[AttrMustUnderstandName]
    encstyle = value.extraattr[AttrEncodingStyleName]
    mu_value = mu.nil? ? nil : (mu == '1')
    # to remove mustUnderstand attribute, set it to nil
    item = SOAPHeaderItem.new(value, mu_value, encstyle, actor)
    super(name, item)
  end