returns the canonical access kind for a receiver type

lowers dot access using the receiver’s XTalk type when available

List-shaped path parts are native method calls and are preserved for the target emitter. Vector-shaped path parts are structural key/index access. Single-segment access becomes x:get-key or x:get-idx. Multi-segment access becomes x:get-path, which is direct chained path access; it is not the guarded traversal provided by xt.lang.common-data/get-in.