# File lib/sass/selector/simple_sequence.rb, line 78
      def resolve_parent_refs(super_seq)
        # Parent selector only appears as the first selector in the sequence
        return [self] unless @members.first.is_a?(Parent)

        members = super_seq.members.dup
        newline = members.pop if members.last == "\n"
        return members if @members.size == 1
        unless members.last.is_a?(SimpleSequence)
          raise Sass::SyntaxError.new("Invalid parent selector: " + super_seq.to_a.join)
        end

        members[0...-1] +
          [SimpleSequence.new(members.last.members + @members[1..-1], subject?)] +
          [newline].compact
      end