public Transformer(IEnumerable<ITransformHandler> handlers)
{
handlers.Each(x => _handlers[x.Key] = x);
_handlers["inner"] = new InnerTransformHandler(this);
_handlers.OnMissing = key =>
{
throw new ArgumentOutOfRangeException(nameof(key), key,
"No transformation handler is available for '" + key + "'");
};
}
