# File lib/docile/execution.rb, line 17
    def exec_in_proxy_context(dsl, proxy_type, *args, &block)
      block_context = eval("self", block.binding)
      proxy_context = proxy_type.new(dsl, block_context)
      begin
        block_context.instance_variables.each do |ivar|
          value_from_block = block_context.instance_variable_get(ivar)
          proxy_context.instance_variable_set(ivar, value_from_block)
        end

        proxy_context.instance_exec(*args, &block)
      ensure
        if block_context.respond_to?(:__docile_undo_fallback__)
          block_context.send(:__docile_undo_fallback__)
        end

        block_context.instance_variables.each do |ivar|
          next unless proxy_context.instance_variables.include?(ivar)
          value_from_dsl_proxy = proxy_context.instance_variable_get(ivar)
          block_context.instance_variable_set(ivar, value_from_dsl_proxy)
        end
      end
    end