function name()
  return "name"
end

function author()
  str = "author"
  barf()
  return str
end

version = function()
  return "1.0"
end

function email()
  return "email" .. "@" .. "example.com"
end

function short_descr()
  return "short description"
end

function description()
  return "description"
end

function filter(gn)
  return true
end
