This ns is mostly just for documentation and for providing an alias.

Defines standard keyword keys used in the implementations ('impls') map
of a persistent PolyMap to override default map behaviors.

Each var defined here holds the actual namespaced keyword as its value
(e.g., `get_k` evaluates to `::get_k` in this ns). The documentation for
the override is attached as metadata to the var.

Override functions associated with these keywords receive the following
arguments:
- this       The PolyMap instance itself.
- m       The underlying persistent data collection.
- impls      The persistent implementations map itself.
- metadata   The persistent metadata map of the PolyMap instance.
Followed by operation-specific arguments like k, v, f, init, etc.

Override functions are generally expected to return the final result
that the corresponding Clojure interface method would return (e.g., a new
PolyMap instance for assoc/dissoc, a value for get, a boolean for containsKey?).
When returning a new PolyMap instance, ensure it's properly constructed,
often using `com.jolygon.poly-map.api-0/make-poly-map` or similar internal
constructors if needed, preserving implementations and metadata appropriately.

This ns is mostly just for documentation and for providing an alias.

Defines standard keyword keys used in the implementations ('impls') map of a
TransientPolyMap to override default transient map behaviors.

Each var defined here holds the actual namespaced keyword as its value
(e.g., `assoc_k_v` evaluates to `::assoc_k_v` in this ns).
The documentation for the override is attached as metadata to the var.

Example expected signature for `::assoc_k_v`:
`(fn [this t_m impls metadata k v] ...)`

Overrides for mutating operations (`assoc!`, `conj!`, `dissoc!`)
should generally return the `this` (the TransientPolyMap instance) to allow chaining.
The override for `persistent!` should return the new persistent `PolyMap` with all
internal maps persisted as well.
Overrides for read operations should return the requested value.