import type { sheets_v4 } from '@googleapis/sheets';
import type { ChartSpec } from '../entities/ChartSpec.js';
import type { EmbeddedObjectBorder } from '../entities/EmbeddedObjectBorder.js';
import type { EmbeddedObjectPosition } from '../entities/EmbeddedObjectPosition.js';
/**
 * Reject a ChartSpec that does not carry exactly one chart type. The entity
 * types the family fields as independent optionals (a zod union would
 * complicate the recursive strict-input pin), so the exactly-one rule is
 * enforced here, once, for every chart operation.
 */
export declare function assertOneChartType(spec: ChartSpec): void;
/** Carry a ChartSpec across the Google boundary, `forGoogle` at each level. */
export declare function toChartSpec(spec: ChartSpec): sheets_v4.Schema$ChartSpec;
/** Carry an EmbeddedObjectPosition across the Google boundary. */
export declare function toEmbeddedObjectPosition(position: EmbeddedObjectPosition): sheets_v4.Schema$EmbeddedObjectPosition;
/** Project a REST EmbeddedObjectPosition, cleaning nulls to undefined. */
export declare function projectEmbeddedObjectPosition(position: sheets_v4.Schema$EmbeddedObjectPosition): EmbeddedObjectPosition;
/** Carry an EmbeddedObjectBorder across the Google boundary. */
export declare function toEmbeddedObjectBorder(border: EmbeddedObjectBorder): sheets_v4.Schema$EmbeddedObjectBorder;
//# sourceMappingURL=charts.d.ts.map