class SomeDSLFacadeObject
  def self.some_dsl_method(&block)
    self.instance_eval &block
  end

  def self.dsl_verb(arg)
    puts "my arg is #{arg.inspect}"
  end
end

class A
    def nondsl_argument
        'from method'
    end

    def do_stuff
        SomeDSLFacadeObject.some_dsl_method do
            dsl_verb nondsl_argument
        end
    end
end


class B

    def do_stuff
        @nondsl_argument = 'from attr'
        SomeDSLFacadeObject.some_dsl_method do
            dsl_verb @nondsl_argument
        end
    end
end

class D

    def do_stuff
        nondsl_argument = 'from local'
        SomeDSLFacadeObject.some_dsl_method do
            dsl_verb nondsl_argument
        end
    end
end



A.new.do_stuff
B.new.do_stuff
D.new.do_stuff