Elements, such as some item definitions or let bindings, declare a name
to refer to that element. Name resolution is the process of tying paths and
other identifiers to the declarations of those elements. Names are segregated
into different namespaces, allowing elements in different namespaces to
share the same name without conflict. Each name is valid within a scope, or
a region of source text where that name may be referenced. Access to certain
names may be restricted based on their visibility.