class Sass::Script::Parser

def node(node, source_range_or_start_pos, end_pos = source_position)
  source_range =
    if source_range_or_start_pos.is_a?(Sass::Source::Range)
      source_range_or_start_pos
    else
      range(source_range_or_start_pos, end_pos)
    end
  node.line = source_range.start_pos.line
  node.source_range = source_range
  node.filename = @options[:filename]
  node
end