def same_position?(pos1, pos2)
      return unless pos1 && pos2
      pos1.line == pos2.line && pos1.offset == pos2.offset
    end
def same_position?(pos1, pos2)
      return unless pos1 && pos2
      pos1.line == pos2.line && pos1.offset == pos2.offset
    end
Sass doesn't define an equality operator for Sass::Source::Position
 objects, so we define a helper for our own use.