/**
* Installs a read-only `type` accessor pair on a `LyraChart` subclass's
* prototype, locking it to `value` — assigning `.type` afterwards (attribute
* or property) is silently ignored. `LyraChart` declares `type` as a plain
* (decorator-managed) class field, and TypeScript forbids a subclass from
* re-declaring a base field as a getter/setter pair via ordinary class
* syntax (TS2611), so the accessor pair is installed directly on the
* prototype instead, which is runtime-equivalent (same shadowing semantics
* as a class-syntax override) without tripping that check. Used by
* `lr-histogram`, the one `LyraChart` subclass whose `type` is fixed rather
* than author-settable; the `lr-*-chart` subclasses (bar/line/pie/doughnut/
* scatter/bubble/radar/polarArea) each keep a plain writable `override type`
* field instead, since their mirrored WA counterpart leaves `type` settable.
*
* Internal only — not re-exported from the public `chart.ts` barrel. The one
* caller (`histogram.class.ts`) imports this module directly.
*/
export declare function lockChartType(ctor:Function,value:string):void;