class ActiveAdmin::StringSymbolOrProcSetting


returning the content when String or using instance_eval when Symbol or Proc.
static (String), methods (Symbol) or procs (Proc). This wrapper takes care of
Many configuration options (Ex: site_title, title_image) could either be

def value(context = self) 

def value(context = self)
  case @setting
  when Symbol, Proc
    context.instance_eval(&@setting)
  else
    @setting
  end
end