# File lib/sass/environment.rb, line 55 def push_frame(frame_info) top_of_stack = stack.last if top_of_stack && top_of_stack.delete(:prepared) top_of_stack.merge!(frame_info) else stack.push(top_of_stack = frame_info) end mixins_in_use << top_of_stack[:mixin] if top_of_stack[:mixin] && !top_of_stack[:prepared] end