``` private inline fun WebSitemapGenerator.add( ...

# language-proposals

[nhaarman]

private inline fun WebSitemapGenerator.add(
      sb: StringBuilder, preLen: Int, models: Iterable<HasFullUrl>
) = add(sb, preLen, models) { it -> it.fullUrl }

private inline fun WebSitemapGenerator.add(
      sb: StringBuilder, 
      preLen: Int, 
      models: Iterable<HasFullUrl>
) = add(sb, preLen, models) { it -> it.fullUrl }