import type { docs_v1 } from '@googleapis/docs';
import type { OptionalColor } from '../entities/OptionalColor.js';
/**
 * Cross the Google boundary for an OptionalColor, passing undefined through.
 * `forGoogle` is shallow and the color chain nests three levels
 * (`color.rgbColor.{red,green,blue}`), each with optional keys that
 * `exactOptionalPropertyTypes` will not let cross as present-and-undefined,
 * so the reconciliation happens once here for every color-bearing handler.
 */
export declare function optionalColor(value: OptionalColor): docs_v1.Schema$OptionalColor;
export declare function optionalColor(value: undefined): undefined;
export declare function optionalColor(value: OptionalColor | undefined): docs_v1.Schema$OptionalColor | undefined;
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