function get(code) {
  return (
    cache[code] ||
    cache[code.replace(/urn:(x-)?ogc:def:crs:EPSG:(.*:)?(\w+)$/, 'EPSG:$3')] ||
    null
  );
}
Get a cached projection by code.
@param {string} code The code for the projection.
@return {import("./Projection.js").default|null} The projection (if cached).