Module serialize 
Source - ElemInfo 🔒 
 - HtmlSerializer
 - SerializeOpts
 
- TraversalScope
 - Used as a parameter to 
serialize, telling it if we want to skip the parent. 
- Serialize
 - Types that can be serialized (according to the xml-like scheme in 
Serializer) implement this
trait. - Serializer
 - Types that are capable of serializing implement this trait
 
- serialize
 - tagname 🔒 
 
- AttrRef
 - A type alias for an attribute name and value (e.g. the 
class="test" in <div class="test">
is represented as (<QualName of type class>, "test").