/**
* Whether lit resolved to its development build. `enableWarning` is inherited
* from `ReactiveElement`, which declares it optional precisely because it
* exists only in development — lit's own docs prescribe guarding on it. Same
* shape in lit 2 and 3, and typed optional in both builds' `.d.ts`, so this
* needs no cast. Read per call, so import order cannot matter.
* @internal
*/
export declare function inLitDevMode(): boolean;
/**
* Warns once per element that a binding found no `<ui-router>` ancestor and has
* therefore degraded to a no-op.
*
* Callers must only reach this **after** the router seek has actually run and
* come back empty. Every seek here is deferred past the element's first render,
* so a binding legitimately sees no router on its first pass; warning there
* would fire on every correctly wired app.
*
* @param element the element whose binding found nothing
* @param subject how to name it in the message, e.g. `<a uiSref="home">`
* @param consequence what will not happen, e.g. `will not navigate`
*
* @internal
*/
export declare function warnMissingRouter(element: Element, subject: string, consequence: string): void;
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