docs: function setBase(base) {
    // TODO: fix upstream
    if (base.length>1 && base[base.length-1]=='/')
      base = base.slice(0,-1)
  
    return through2(function(item, _, next){
      var value = item.value
      if (typeof value == 'object') value.base = base
      next(null, item)
    })
  }