class Sass::Render

def importers

be semicolon-separated on Windows and colon-separated elsewhere.
5. Each load path specified in the SASS_PATH environment variable, which should
4. Each load path in includePaths
3. Loading a file relative to the current working directory.
2. Each custom importer.
1. Loading a file relative to the file in which the @use or @import appeared.
Order 
def importers
  custom_importers = @importer.map.with_index do |_, id|
    EmbeddedProtocol::InboundMessage::CompileRequest::Importer.new(
      importer_id: id
    )
  end
  include_path_importers = @include_paths
                           .concat(Sass.include_paths)
                           .map do |include_path|
    EmbeddedProtocol::InboundMessage::CompileRequest::Importer.new(
      path: File.absolute_path(include_path)
    )
  end
  custom_importers.concat include_path_importers
end