class Liquid::Unless

def render_to_output_buffer(context, output)
  # First condition is interpreted backwards ( if not )
  first_block = @blocks.first
  result = Liquid::Utils.to_liquid_value(
    first_block.evaluate(context),
  )
  unless result
    return first_block.attachment.render_to_output_buffer(context, output)
  end
  # After the first condition unless works just like if
  @blocks[1..-1].each do |block|
    result = Liquid::Utils.to_liquid_value(
      block.evaluate(context),
    )
    if result
      return block.attachment.render_to_output_buffer(context, output)
    end
  end
  output
end