2.3.6 Resolving multinames
If the multiname has a namespace set, then the object is searched for any properties whose name is the same as the multinames name, and whose namespace matches any of the namespaces in the multinames namespace set.
Since the multiname may have more than one namespace, there could be multiple properties that match the
multiname. If there are multiple properties that match a TypeError is raised since it is ambiguous which
property the multiname is referring to. If no properties match, then the multiname is unresolved on that object.