rails: #content_for implement

ex2.rb

class C
  def content_for(smth, content)
    if  smth == 'smth'
      m do
        p "smth #{content}"
      end
    elsif smth == 'smth2'
      m do
        p "smth2 #{content}"
      end
    end

  end

  def m
    yield "smth"
    yield "smth2"
  end

end


C.new.content_for('smth', 'a content')