export declare const ROOT_CSS_STACKING_CONTEXT_ID = "css:root";
/**
 * Leaf z-index participates in the nearest ANCESTOR stacking context. Exclude
 * the leaf itself: an element that establishes a context still compares its own
 * z-index with siblings in its parent's context.
 */
export declare function resolveCssStackingContextId(node: Element): string;
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