def set(container, &declarations)
      struct = OpenStruct.new
      declarations.call(struct)
      send("#{container}=", struct.table)
    end
def set(container, &declarations)
      struct = OpenStruct.new
      declarations.call(struct)
      send("#{container}=", struct.table)
    end
Use this method to setup your request's payload and headers.

 Example:

   request.set :headers do |h|
     h.content_type = 'application/ufo'
   end

   request.set :params do |p|
     p.sessionid = '12323'
     p.api_key   = '13123
   end