/**
 * Field names attached by flame utilities to each datapoint before handing the
 * row to XYChart. Kept as constants so accessors passed to XYChart and reads
 * inside tooltips stay in lockstep.
 */
/**
 * Depth of the frame in the call tree (root = 0).
 */
export declare const DEPTH_FIELD = "depth";
/**
 * Index into the original `data` array; used to route tooltip actions back to the caller's row.
 */
export declare const FLAME_ORIGINAL_IDX = "__flameOriginalIdx";
/**
 * Derived span duration: `endAccessor - startAccessor`.
 */
export declare const VALUE_FIELD = "__value";
/**
 * Normalized start: `startAccessor - minTime`.
 */
export declare const START_FIELD = "__start";
/**
 * Normalized end: `endAccessor - minTime`.
 */
export declare const END_FIELD = "__end";
/**
 * Number of direct children of a node in the aggregated flame graph.
 */
export declare const CHILDREN_COUNT_FIELD = "childrenCount";
/**
 * Normalized self value: the span's exclusive time (or sample count), written
 * by `aggregateSpansToFlameGraph` and `orderSpansHierarchically` so downstream
 * readers are independent of the raw accessor path.
 */
export declare const SELF_VALUE_FIELD = "__selfValue";
export declare const XY_DEFAULTS: {
    readonly x0Accessor: "x0";
    readonly x1Accessor: "x1";
    readonly xAxisId: "flame-x-axis";
    readonly yAxisId: "flame-y-axis";
};
export declare const DISPLAY_NAME_FLAME_CHART = "FlameChart";
export declare const DISPLAY_NAME_FLAME_GRAPH = "FlameGraph";
/** Default chart height in pixels when the consumer passes a non-pixel height value. */
export declare const DEFAULT_CHART_HEIGHT = 300;
/**
 * Vertical space consumed by the FlameChart's x-axis row plus one OVERLAY_PADDING.
 * = worst-case single-line x-axis height (20px) + OVERLAY_PADDING (7px).
 */
export declare const FLAME_CHART_HEIGHT_OVERHEAD_PX = 27;
/**
 * Vertical space consumed by the FlameGraph when both axes are hidden.
 * Equals 2 × OVERLAY_PADDING (7px each side) = 14px.
 */
export declare const FLAME_GRAPH_HEIGHT_OVERHEAD_PX = 14;
/** Fixed height in pixels for each flame bar row. */
export declare const FRAME_HEIGHT_PX = 16;
export declare const DEFAULT_FLAME_CHART_UNIT: [Readonly<{
    group: "second";
    index: -3;
    exponent: 1;
}>];
export declare const DEFAULT_FLAME_GRAPH_UNIT: [Readonly<{
    group: "count";
    index: 0;
    exponent: 1;
}>];
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