class ActiveAdmin::Views::Panel

def add_child(child) 

def add_child(child)
  if @contents
    @contents << child
  else
    super
  end
end

def build(title, attributes = {}) 

def build(title, attributes = {})
  icon_name = attributes.delete(:icon)
  icn = icon_name ? icon(icon_name) : ""
  super(attributes)
  add_class "panel"
  @title = h3(icn + title.to_s)
  @contents = div(:class => "panel_contents")
end

def children?

correcly appends string values, etc.
contents have been added to. This ensures that the panel
Override children? to only report children when the panel's 
def children?
  @contents.children?
end