/**
 * Snaps the end angle of an arc to create a full circle when the arc spans almost, but not
 * exactly, the full circle.
 *
 * When an arc spans almost the full circle (e.g., when the remaining slices of a pie are
 * extremely small compared to the largest one), its start and end points are so close that they
 * can round to the same path coordinates. SVG omits arcs whose end point equals their start
 * point, which makes the quasi-full-circle arc invisible.
 * See https://github.com/mui/mui-x/issues/14167
 *
 * The end angle is only snapped when the gap left by the arc is smaller than the precision of
 * the serialized path, so the snapping is visually lossless.
 *
 * @param startAngle The start angle of the arc, in radians.
 * @param endAngle The end angle of the arc, in radians.
 * @param outerRadius The outer radius of the arc.
 * @param padAngle The pad angle of the arc, in radians.
 * @returns The end angle, snapped to `startAngle ± 2 * Math.PI` when applicable.
 */
export declare function snapEndAngleToFullCircle(startAngle: number, endAngle: number, outerRadius: number, padAngle?: number): number;